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Online since: May 2014
Authors: Bo Zheng, Xu Long An, Qi Bin Liu
The structure types are the dominant factor for controlling properties of HEAs coating.
When Ti content increases to x=0.4, the alloy exhibits excellent mechanical properties with high hardness, the hardness reaches a maximum (639HV0.2).
Hot consolidation and mechanical properties of nanocrystalline equiatomic AlFeTiCrZnCu high entropy alloy after mechanical alloying, J Mater Sci. (2010) 45: 5158-5163
Prearation and properties of FeNiMnCuC0.2Alx high-entropy alloy, J.
Structure and properties of FeCoNiCrCu0.5Alx high-entropy alloy.
When Ti content increases to x=0.4, the alloy exhibits excellent mechanical properties with high hardness, the hardness reaches a maximum (639HV0.2).
Hot consolidation and mechanical properties of nanocrystalline equiatomic AlFeTiCrZnCu high entropy alloy after mechanical alloying, J Mater Sci. (2010) 45: 5158-5163
Prearation and properties of FeNiMnCuC0.2Alx high-entropy alloy, J.
Structure and properties of FeCoNiCrCu0.5Alx high-entropy alloy.
Online since: March 2006
Authors: Dong Ho Bae, Byung Bok Choi
Corrosion Fatigue Characteristics of Artificially Sensitized
Austenitic STS304
Byungbok Choi1,a and Dongho Bae2,b,∗
1 Graduate School, Mechanical Engineering Department, Sungkyunkwan University,300
Chunchun-dong, Jangan-gu, Suwon, Kyunggi-do, 440-746 Korea
Tel.:-82-31-290-7479
2 Professor, School of Mechanical Engineering, Sungkyunkwan University,
300 Chunchun-dong, Jangan-gu, Suwon, Kyunggi-do, 440-746 Korea
Tel.:-82-31-290-7443, Fax.:-82-31-295-1937
icarus0265@hotmail.com, bae@yurim.skku.ac.kr
Keywords: Sensitization, Austenitic stainless steel, Corrosion, Corrosion fatigue characteristics,
Corrosion fatigue strength
Abstract: Austenitic stainless steel is a useful material for various industrial facilities such as the
nuclear and steam power plant and the heavy chemical industry due to its good corrosion resistance
and mechanical properties.
However, it has also a large problem that austenitic stainless steel is sensitized in the welding process and its corrosion resistance and mechanical properties decreases by sensitization.
Chemical composition and mechanical properties of specimen tested are illustrated in Tables 1 and 2, respectively [4].
Table 1 Chemical composition and mechanical properties of STS304 Fig. 1 Configuration of smooth specimen for corrosion fatigue test Fig. 2 Horizontal type corrosion fatigue tester Fig. 3 Configuration of grip and cell for corrosion fatigue test C Mn Si Cr Ni P S Yield strength (MPa) Tensile strength (MPa) Elongation (%) 0.08 2.0 1.0 18.0-20.0 8.0-10.5 0.05 0.03 314 654 30 Test Condition and Procedure.
That is, affecting factor to failure by corrosion fatigue at high load range was predicted as external force rather than influence of electrochemical corrosion reaction, on the contrary, at low load range, influence of corrosion besides external force was concerned.
However, it has also a large problem that austenitic stainless steel is sensitized in the welding process and its corrosion resistance and mechanical properties decreases by sensitization.
Chemical composition and mechanical properties of specimen tested are illustrated in Tables 1 and 2, respectively [4].
Table 1 Chemical composition and mechanical properties of STS304 Fig. 1 Configuration of smooth specimen for corrosion fatigue test Fig. 2 Horizontal type corrosion fatigue tester Fig. 3 Configuration of grip and cell for corrosion fatigue test C Mn Si Cr Ni P S Yield strength (MPa) Tensile strength (MPa) Elongation (%) 0.08 2.0 1.0 18.0-20.0 8.0-10.5 0.05 0.03 314 654 30 Test Condition and Procedure.
That is, affecting factor to failure by corrosion fatigue at high load range was predicted as external force rather than influence of electrochemical corrosion reaction, on the contrary, at low load range, influence of corrosion besides external force was concerned.
Online since: May 2014
Authors: António Castanhola Batista, Serafino Caruso, J.C. Outeiro, Domenico Umbrello
Residual stress is one of the most important surface integrity parameter that can significantly affect the service performance of a mechanical component, such as: contact fatigue, corrosion resistance and part distortion.
In this context, hard turning is becoming more competitive because of its ability to properly merge factors of great interest, such as production costs, productivity and especially product quality.
Among these the main ones are associated with the high temperatures generated at the tool-chip and tool-workpiece interfaces that strongly affect the surface integrity and consequently the functional performance and life of a mechanical component.
To describe the influence of each single cutting parameter on the in-depth residual stress profile, four different factors were considered (Fig. 2): a: Surface Residual Stress; b: Maximum Compressive Residual Stress Below Surface; c: Penetration Depth; d: Thickness Affected by Machining Residual Stress.
Brandt, “Hard turning influences on the workpiece properties”, Trans.
In this context, hard turning is becoming more competitive because of its ability to properly merge factors of great interest, such as production costs, productivity and especially product quality.
Among these the main ones are associated with the high temperatures generated at the tool-chip and tool-workpiece interfaces that strongly affect the surface integrity and consequently the functional performance and life of a mechanical component.
To describe the influence of each single cutting parameter on the in-depth residual stress profile, four different factors were considered (Fig. 2): a: Surface Residual Stress; b: Maximum Compressive Residual Stress Below Surface; c: Penetration Depth; d: Thickness Affected by Machining Residual Stress.
Brandt, “Hard turning influences on the workpiece properties”, Trans.
Online since: February 2013
Authors: Ying Li, Wen Juan Gu, Bang Gui He, Bei Hai He
The results implied that the surface properties of coated paper could be adjusted and improved by increasing the coating solid.
The ink penetration behavior depends on the coating surface topography and properties.
There are many factors affecting the structure and surface properties of the coating layer in the papermaking process, which include coating recipes, coating conditions and calendering, etc.
In fact, coating recipe is the important factor which affects structure and properties of coating layer.
The findings indicated that coating solid affected the surface properties owing to the different coating composition.
The ink penetration behavior depends on the coating surface topography and properties.
There are many factors affecting the structure and surface properties of the coating layer in the papermaking process, which include coating recipes, coating conditions and calendering, etc.
In fact, coating recipe is the important factor which affects structure and properties of coating layer.
The findings indicated that coating solid affected the surface properties owing to the different coating composition.
Online since: November 2012
Authors: Mohd Hilmi Othman, Sulaiman Hasan, Shazarel Shamsudin
Ming-Chih Huang et.al (1999) have explored the factors affecting the warpage problem of an injection molded part with thin shell featured, made from Polycarbonate/Acrylonitrile Styrene PC/ABS blend.
Therefore, to continue the research, this investigation shall be carried out to determine which factors that affecting warpage and shrinkage, by using different material which is HDPE.
The properties of this material are stated in Table 1. [1] Table 1: General Properties of Generic Unfilled HDPE [1] Specific Gravity 0.94 Tensile Modulus @ 73oF (Mpsi) 0.2 Tensile Strength @ yield (Kpsi) 3.75 Notch Izod Impact @ 73oF (ft-lb-in) No break Thermal Limit Service Temperature.
The L9 is chosen as an OA because it is suitable for four factors with three levels.
Parameter Simulation Results Experimental Results Melt Temperature 180 180 Filling Time (s) 0.220 0.197 Packing Time (s) 15 5 Packing Pressure (%) 45 35 Conclusion Of all the factors affecting warpage and shrinkage in injection molding, the packing time is the most influential factor, which shows a contribution rate of 48.93%.
Therefore, to continue the research, this investigation shall be carried out to determine which factors that affecting warpage and shrinkage, by using different material which is HDPE.
The properties of this material are stated in Table 1. [1] Table 1: General Properties of Generic Unfilled HDPE [1] Specific Gravity 0.94 Tensile Modulus @ 73oF (Mpsi) 0.2 Tensile Strength @ yield (Kpsi) 3.75 Notch Izod Impact @ 73oF (ft-lb-in) No break Thermal Limit Service Temperature.
The L9 is chosen as an OA because it is suitable for four factors with three levels.
Parameter Simulation Results Experimental Results Melt Temperature 180 180 Filling Time (s) 0.220 0.197 Packing Time (s) 15 5 Packing Pressure (%) 45 35 Conclusion Of all the factors affecting warpage and shrinkage in injection molding, the packing time is the most influential factor, which shows a contribution rate of 48.93%.
Online since: August 2005
Authors: Y. Ma, Z.F. Lou
Research of Single-crystal Diamond Abrasive Efficiency
Raising abrasive efficiency is the key of reducing the cost of single-crystal diamond abrading, and
many factors affect abrasive efficiency, which will be discussed below.
When we design single-crystal diamond tools and determine which crystal face can be taken as the face of tool or flank of tool, some factors should be considered: a.
The crystal face should have high hardness, good wear property and low friction factor with workpiece; b.
But [100] crystal face has better wear property and smaller friction factor with nonferrous metal and higher micro-strength, it is easier to obtain a shaper cutting edge by abrading [100] crystal face then [110] crystal face.
In addition, following special factors should be considered: a.
When we design single-crystal diamond tools and determine which crystal face can be taken as the face of tool or flank of tool, some factors should be considered: a.
The crystal face should have high hardness, good wear property and low friction factor with workpiece; b.
But [100] crystal face has better wear property and smaller friction factor with nonferrous metal and higher micro-strength, it is easier to obtain a shaper cutting edge by abrading [100] crystal face then [110] crystal face.
In addition, following special factors should be considered: a.
Online since: June 2025
Authors: Xiao Li Zheng, Pei Wang, Mu Tong Sun, Xu Nan Zhang, Hao Yu Bai, Hong Zhao Li
Magnetic Properties of FeNi/RE Magnetic Nanomultilayer Films
X.L.
At a fixed angle, slight differences in Hres among samples may stem from surface anisotropy factors such as smoothness.
These interactions alter the electronic structure and spin arrangement of the FeNi alloy, thereby affecting its magnetic properties.
Furthermore, interface effects may influence the damping factor and dynamic process of magnetization intensity, further modulating the film's magnetic properties[11,12].
Our findings reveal the mechanisms by which rare earth element doping affects the magnetic properties of FeNi alloy films and the complex behaviors exhibited during magnetization.
At a fixed angle, slight differences in Hres among samples may stem from surface anisotropy factors such as smoothness.
These interactions alter the electronic structure and spin arrangement of the FeNi alloy, thereby affecting its magnetic properties.
Furthermore, interface effects may influence the damping factor and dynamic process of magnetization intensity, further modulating the film's magnetic properties[11,12].
Our findings reveal the mechanisms by which rare earth element doping affects the magnetic properties of FeNi alloy films and the complex behaviors exhibited during magnetization.
Online since: March 2006
Authors: Xin Hua Ji, Yu Xian Di, Lin'an Li, Jin Long Chen, Yu Wen Qin
Computational Simulation of Tensile Mechanical Properties of
Nano-crystal Material Fe
Yuxian Di1, a
Xinhua Ji
2, b
Lin'an Li
3, c
Yuwen Qin
4, d
Jinlong Chen
5, e
1
Dept. of Mechanics, Tianjin University, Tianjin 300072, P.R.
The traditional finite element analysis method in conjunction with the atomic simulation technology was applied to study the mechanical properties of nanostructure materials.
One of the most frequently investigated is the mechanical properties.
The constitutive model for each phase is developed in next section Material model For the nanocrystalline phase, we assume the mechanical properties of a perfect, dislocation free material.
The defect and impurity would affect the NC materials mechanical properties.
The traditional finite element analysis method in conjunction with the atomic simulation technology was applied to study the mechanical properties of nanostructure materials.
One of the most frequently investigated is the mechanical properties.
The constitutive model for each phase is developed in next section Material model For the nanocrystalline phase, we assume the mechanical properties of a perfect, dislocation free material.
The defect and impurity would affect the NC materials mechanical properties.
Online since: November 2007
Authors: K. Watanabe, Mitsuharu Yamamoto, Kazuhito Fujiwara, Tetsuyuki Hiroe, Hidehiro Hata
Explosive driven rapid fracture in a structural body will be preceded by a compression
process, and the compression effects on mechanical properties of the materials are clearly important
to understand shock-induced failure such as spall or fragmentation phenomena.
Measured mechanical properties of the recovered specimens reveal remarkable changes from those of the virgin materials, giving some considerations on the dynamic fracture [2-4, 7] induced by shocks.
Mechanical Properties of Recovered Plates and Discussions Microhardness.
It is noticeable that this tendency almost corresponds with the data of Fig. 8, where the ratio of the products of fεσ ⋅2.0 in Eq. 4 of precompressed specimens to those for virgin materials are 63.9% (A2017), 84.6% (A2017/AT-attached) and 122.4% (304SS), although cylinder fragmentation phenomenon must be affected by some other factors.
Steinberg: Equation of State and Strength Properties of Selected Materials, LLNL Report UCRL-MA-106439, (1991)
Measured mechanical properties of the recovered specimens reveal remarkable changes from those of the virgin materials, giving some considerations on the dynamic fracture [2-4, 7] induced by shocks.
Mechanical Properties of Recovered Plates and Discussions Microhardness.
It is noticeable that this tendency almost corresponds with the data of Fig. 8, where the ratio of the products of fεσ ⋅2.0 in Eq. 4 of precompressed specimens to those for virgin materials are 63.9% (A2017), 84.6% (A2017/AT-attached) and 122.4% (304SS), although cylinder fragmentation phenomenon must be affected by some other factors.
Steinberg: Equation of State and Strength Properties of Selected Materials, LLNL Report UCRL-MA-106439, (1991)
Online since: April 2017
Authors: Un Hak Hwang
Both the surface temperature of substrates and deposition time were affecting factors.
The Fig. 3 shows also adhesion between layers affects the degree of film hardness for the mold.
Ahmadpourian, Effects of substrate temperature on the properties of sputtered TiN thin films, J.
Major, Biomechanical properties of the thin PVD coatings defined by red blood cells, Bull.
Leng, Structure, mechanical and corrosion properties of TiN films deposited on stainless steel substrates with different inclination angles by DCMS and HPPMS, Surf.
The Fig. 3 shows also adhesion between layers affects the degree of film hardness for the mold.
Ahmadpourian, Effects of substrate temperature on the properties of sputtered TiN thin films, J.
Major, Biomechanical properties of the thin PVD coatings defined by red blood cells, Bull.
Leng, Structure, mechanical and corrosion properties of TiN films deposited on stainless steel substrates with different inclination angles by DCMS and HPPMS, Surf.