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Online since: July 2015
Authors: C.M. Mardziah, M.N. Berhan, Koay Mei Hyie, Nor Azrina Resali
There are several factors including the crystallite size, the crystal orientation, and the alloy composition, that can affect the mechanical properties of these deposited films [5].
These properties also can be affected by the finishing the coating with heat treatment process.
Mechanical properties of EN coatings such as hardness and wear resistance are enhanced by heat treatment.
Another factor affecting the behavior of hardness of the nanocrystalline CoNiFe in this study may be attributed to the grain size and porosity effect.
Akanbi, Effect of Heat Treatment on Mechanical Properties and Microstructure of NST 37-2 Steel, Journal of Minerals and Materials Characterization and Engineering. 10 (3), March 2011
These properties also can be affected by the finishing the coating with heat treatment process.
Mechanical properties of EN coatings such as hardness and wear resistance are enhanced by heat treatment.
Another factor affecting the behavior of hardness of the nanocrystalline CoNiFe in this study may be attributed to the grain size and porosity effect.
Akanbi, Effect of Heat Treatment on Mechanical Properties and Microstructure of NST 37-2 Steel, Journal of Minerals and Materials Characterization and Engineering. 10 (3), March 2011
Online since: February 2012
Authors: Raoul Plettke, Thomas Schneider, Michael Lechner, Marion Merklein
With THTP the mechanical properties of the material are locally modified by a short-term heat treatment.
The changes of the mechanical properties caused by the heat treatment were analyzed by tensile tests.
Heat treatment layouts and forming results Based on the knowledge of the mechanical properties and the heat-affected zone, appropriate heat treatment layouts have to be found in order to enhance the forming limit.
The key idea of THTP is to locally modify the mechanical properties of the profile.
Key idea is to modify partial the mechanical properties by a local laser heat treatment.
The changes of the mechanical properties caused by the heat treatment were analyzed by tensile tests.
Heat treatment layouts and forming results Based on the knowledge of the mechanical properties and the heat-affected zone, appropriate heat treatment layouts have to be found in order to enhance the forming limit.
The key idea of THTP is to locally modify the mechanical properties of the profile.
Key idea is to modify partial the mechanical properties by a local laser heat treatment.
Online since: September 2011
Authors: Chun Hu Tao, Xin Ling Liu
Introduction
Researches think that motivity is the most important factor of aviation development.
There will be incipient fault of flight safety if only some mechanical properities are developed but working condition mechanical and damage failure behavior of usage environment are lack.
In the course of item manage the main affect factor is usually technology venture.
Microscopic structure, composition, physical property are verified in laboratory, material preparing process is verified, material key property is confirmed. 4 Material property affect factors are studied in laboratory environment, material standard and process procedure of pilot-scale are formed primary The affect factors, usually defects, normal mechanical property and key property of material are studied, the fatigue damage behavior of typical test component or simulation component is studied, inspection and evaluation method of material are studied, material standard and process procedure are formed primary 5 Typical component is manufactured and verified in typical simulation environment Stability of material batch is verified; typical component passes simulation verification; The key property of material and typical component under typical simulation environment is studied. 6 Process of component is stable, component passes test verification of model machine or function verification
of material are confirmed 2 The affect rules of various elements are confirmed 3 The parameters of preparation process of material in the condition of pilot-scale are confirmed. 4 The common defects, type and influence to material property are represented. 5 Custom mechanical property(for example, σb, σ0.2, δ, φ, αk, E)of different batch are tested in laboratory environment 6 Key property of test component of different batch are tested in laboratory environment 7 Mechanical basic property of pilot-scale or semiautomation reach typical environment request 8 Material inspection characteristic is studied and the method of inspection and evaluation are given 9 The damage failure behavior of laboratory environment is studied. 10 Key preparation process is confirmed, parameters of preparation process of typical test component or simulate component are verified, test component or simulate component are made. 11 Key preparation process is assessed in the condition of laboratory environment 12
There will be incipient fault of flight safety if only some mechanical properities are developed but working condition mechanical and damage failure behavior of usage environment are lack.
In the course of item manage the main affect factor is usually technology venture.
Microscopic structure, composition, physical property are verified in laboratory, material preparing process is verified, material key property is confirmed. 4 Material property affect factors are studied in laboratory environment, material standard and process procedure of pilot-scale are formed primary The affect factors, usually defects, normal mechanical property and key property of material are studied, the fatigue damage behavior of typical test component or simulation component is studied, inspection and evaluation method of material are studied, material standard and process procedure are formed primary 5 Typical component is manufactured and verified in typical simulation environment Stability of material batch is verified; typical component passes simulation verification; The key property of material and typical component under typical simulation environment is studied. 6 Process of component is stable, component passes test verification of model machine or function verification
of material are confirmed 2 The affect rules of various elements are confirmed 3 The parameters of preparation process of material in the condition of pilot-scale are confirmed. 4 The common defects, type and influence to material property are represented. 5 Custom mechanical property(for example, σb, σ0.2, δ, φ, αk, E)of different batch are tested in laboratory environment 6 Key property of test component of different batch are tested in laboratory environment 7 Mechanical basic property of pilot-scale or semiautomation reach typical environment request 8 Material inspection characteristic is studied and the method of inspection and evaluation are given 9 The damage failure behavior of laboratory environment is studied. 10 Key preparation process is confirmed, parameters of preparation process of typical test component or simulate component are verified, test component or simulate component are made. 11 Key preparation process is assessed in the condition of laboratory environment 12
Online since: June 2022
Authors: Huu Nghi Huynh, Trong Hieu Bui, Nguyen Huu Hoang Tran, Tan Huy Le
Feed system and technology parameters are one of the important factors directly affecting the product quality of FDM technology in particular and material extruding technology in general, especially when using soft, flexible materials such as TPU (Thermoplastic polyurethanes) and PVA (Polyvinyl Alcohol).
Many researchers have pointed out that the technological parameters can affect the size accuracy of FDM products.
The results show that layer thickness is the most important factor for width and thickness deviations.
References [1] Gebisa A., and Lemu H., Investigating Effects of Fused-Deposition Modeling (FDM) Processing Parameters on Flexural Properties of ULTEM 9085 using Designed Experiment, Materials, 11(4), 500, 2018
S., Parametric appraisal of mechanical property of fused deposition modelling processed parts, Materials & Design, 31(1), pp. 287–295, 2010
Many researchers have pointed out that the technological parameters can affect the size accuracy of FDM products.
The results show that layer thickness is the most important factor for width and thickness deviations.
References [1] Gebisa A., and Lemu H., Investigating Effects of Fused-Deposition Modeling (FDM) Processing Parameters on Flexural Properties of ULTEM 9085 using Designed Experiment, Materials, 11(4), 500, 2018
S., Parametric appraisal of mechanical property of fused deposition modelling processed parts, Materials & Design, 31(1), pp. 287–295, 2010
Online since: February 2011
Authors: Huan Qiang Luan
Based on pull-out test of different diametrical rebars(12,14,16,20,22) with different anchorage length(10d,15d,20d) in concrete foundation of different strength(C20,C25,C30,C40).Factors affecting the ultimate bearing capacity of rebars are deduced.
It has the advantages in short curing time, good mechanical properties and strong bond force, but it also has disadvantages such as expensive price, poor high temperature resistance, poor durability, and so on[1].While inorganic material can surmount these deficiencies, it has capability of resistant to high temperature, fire-resistant, low cost, and small dielectric loss.
Based on pull-out test of different diametrical rebars with different anchorage length in concrete foundation of different strength .Factors affecting the ultimate bearing capacity of rebars are deduced.
The analysis shows that rebars has good bond and anchor property as the anchor length reaches 15d.
It has the advantages in short curing time, good mechanical properties and strong bond force, but it also has disadvantages such as expensive price, poor high temperature resistance, poor durability, and so on[1].While inorganic material can surmount these deficiencies, it has capability of resistant to high temperature, fire-resistant, low cost, and small dielectric loss.
Based on pull-out test of different diametrical rebars with different anchorage length in concrete foundation of different strength .Factors affecting the ultimate bearing capacity of rebars are deduced.
The analysis shows that rebars has good bond and anchor property as the anchor length reaches 15d.
Online since: December 2012
Authors: You Jun Lu, Yu Hong Chen, Y. Jiang, Lan Er Wu, Zhen Kun Huang
Microstructure is very important to the properties of materials.
If these additive powder agglomerations can not be dispersed well, that will affect the densification and the mechanical properties of sintered body.
If these additive powder agglomerations can not be dispersed well, that will affect the density and the mechanical properties of sintered body.
Akira, Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating, Transactions of JWRI. 35 (2006) 35-41
Chen, Effective Factors of Spray Prilling of SiC Powder, China Powder Technology. 5 (2007) 5-6
If these additive powder agglomerations can not be dispersed well, that will affect the densification and the mechanical properties of sintered body.
If these additive powder agglomerations can not be dispersed well, that will affect the density and the mechanical properties of sintered body.
Akira, Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating, Transactions of JWRI. 35 (2006) 35-41
Chen, Effective Factors of Spray Prilling of SiC Powder, China Powder Technology. 5 (2007) 5-6
Online since: December 2010
Authors: Long Jun Dong, Fei Yue Wang, Zhi Sheng Xu
Phreatic surface is one of the most important factors to influence tailing dam security degree.
Based on analysis of affecting factors of phreatic surface in tailing dam, the phreatic surface SVM predicted method is bring forward to predict the phreatic surface.
One of the most important factors to influence security degree if phreatic surface, every 1metre descent of phreatic surface will lead to stability safety factor of static force increase 0.05 or more.
However, due to a multitude factors influencing the location of phreatic surface in tailing dam, it is greatly difficult to accurately calculate it.
Based on analysis of affecting factors of phreatic surface in tailing dam, the phreatic surface SVM predicted method is bring forward to predict the phreatic surface.
Based on analysis of affecting factors of phreatic surface in tailing dam, the phreatic surface SVM predicted method is bring forward to predict the phreatic surface.
One of the most important factors to influence security degree if phreatic surface, every 1metre descent of phreatic surface will lead to stability safety factor of static force increase 0.05 or more.
However, due to a multitude factors influencing the location of phreatic surface in tailing dam, it is greatly difficult to accurately calculate it.
Based on analysis of affecting factors of phreatic surface in tailing dam, the phreatic surface SVM predicted method is bring forward to predict the phreatic surface.
Online since: February 2013
Authors: Xue Ping Ren, Hui Bin Wu, Xing Hai Liu, Feng Juan Wu, Ji Quan Sun
Using scanning electron microscopy, optical microscopy, hardness tester and tensile testing machine analyses the influence of double-fined treatment on microstructure and mechanical properties of GCr15 steels.
It depends on the in-depth understanding of the organizational structure, and the appropriate process measures.[5-8] The necessary condition to achieve superplastic are internal factors and external conditions.
The grain size is a important factor to affect the superplastic elongation size important factors.
The grain size is an important factor affecting the superplasticity.
The mechanical properties was evaluated using tensile tests.
It depends on the in-depth understanding of the organizational structure, and the appropriate process measures.[5-8] The necessary condition to achieve superplastic are internal factors and external conditions.
The grain size is a important factor to affect the superplastic elongation size important factors.
The grain size is an important factor affecting the superplasticity.
The mechanical properties was evaluated using tensile tests.
Online since: January 2005
Authors: Seong Ho Yang, Zin Hyoung Lee
The formation of nitrogen gas pores is affected by various factors such as solidification
sequence, solubility of nitrogen, cooling rate, melt pressure, nitrogen content etc.
Introduction Nitrogen alloying to stainless steel is very effective for improving not only mechanical properties but also corrosion resistance such as pitting resistance in NOx environment [1].
And the factors to affect the nitrogen gas pores were discussed. 2.
It is thought that the formation of nitrogen gas pores is mostly affected by nitrogen content, since solidification sequence doesn't change from FA mode to A mode at a given variation of nitrogen content. 3.3 The effect of cooling rate It is known the fact that increasing cooling rate increases porosity, because higher cooling rate leads to larger segregation [11].
Conclusions Nitrogen porosity in Fe-16Cr-3Ni-9Mn stainless steel was investigated and the factors to affect nitrogen porosity were discussed.
Introduction Nitrogen alloying to stainless steel is very effective for improving not only mechanical properties but also corrosion resistance such as pitting resistance in NOx environment [1].
And the factors to affect the nitrogen gas pores were discussed. 2.
It is thought that the formation of nitrogen gas pores is mostly affected by nitrogen content, since solidification sequence doesn't change from FA mode to A mode at a given variation of nitrogen content. 3.3 The effect of cooling rate It is known the fact that increasing cooling rate increases porosity, because higher cooling rate leads to larger segregation [11].
Conclusions Nitrogen porosity in Fe-16Cr-3Ni-9Mn stainless steel was investigated and the factors to affect nitrogen porosity were discussed.
Online since: August 2013
Authors: Shuo Wang, Chong Wei Huang, Xian Zhi Shao, Xian Zhao Du, Er Hao Su
The mechanical properties of subgrade affect the service level of tramcar.
Therefore, if the thickness of the graded gravel layer and the soil layer treated with lime are constant, properties of the layers will play a critical influence on the resilient modulus of the subgrade. 4, Vertical displacement occurred in the earth subgrade takes a great important role in such deformation problem Therefore, if the thickness of the graded gravel layer and the soil layer treated with lime are constant, properties of earth subgrade will play a critical influence on the resilient modulus of the subgrade.
In preparation for field experiments which takes determining the relevant calculation parameters and validation as purpose, a basic platform for analysis of mechanical response for subgrade of tramcar with monolithic track-bed is established. 2, Based on the three-dimensional finite element model, considering gravity stress and some complicated non-linear factors (vehicle loads monolithic track-bed and properties of subgrade, etc),mechanical response for subgrade is discussed thoroughly and working status for subgrade of tramcar with monolithic track-bed is primarily identified. 3, The analysis results of vertical displacement can offer references for designing the thickness of layers and the criterion of compaction, solving the deformation problem and resilient modulus for subgrade of tramcar with monolithic track-bed, which provide design basis, theoretical support and the basis for decision-making for the future engineering.
Changsha: Central South University, 2005 [5]Sun Zhonglin: Experiment Research for Dispersive Soil Dynamic Characteristics Influence Factors [D].
[9]SUN Zhonglin:Experiment Research for Dispersive Soil Dynamic Characteristics Influence Factors [D].
Therefore, if the thickness of the graded gravel layer and the soil layer treated with lime are constant, properties of the layers will play a critical influence on the resilient modulus of the subgrade. 4, Vertical displacement occurred in the earth subgrade takes a great important role in such deformation problem Therefore, if the thickness of the graded gravel layer and the soil layer treated with lime are constant, properties of earth subgrade will play a critical influence on the resilient modulus of the subgrade.
In preparation for field experiments which takes determining the relevant calculation parameters and validation as purpose, a basic platform for analysis of mechanical response for subgrade of tramcar with monolithic track-bed is established. 2, Based on the three-dimensional finite element model, considering gravity stress and some complicated non-linear factors (vehicle loads monolithic track-bed and properties of subgrade, etc),mechanical response for subgrade is discussed thoroughly and working status for subgrade of tramcar with monolithic track-bed is primarily identified. 3, The analysis results of vertical displacement can offer references for designing the thickness of layers and the criterion of compaction, solving the deformation problem and resilient modulus for subgrade of tramcar with monolithic track-bed, which provide design basis, theoretical support and the basis for decision-making for the future engineering.
Changsha: Central South University, 2005 [5]Sun Zhonglin: Experiment Research for Dispersive Soil Dynamic Characteristics Influence Factors [D].
[9]SUN Zhonglin:Experiment Research for Dispersive Soil Dynamic Characteristics Influence Factors [D].