Search results

The microstructure and mechanical properties of the laser microwelding joint for SUS 321 sheet Liu Geping*a, Chen Yuhuab, Wang Shanlinc, Ge Junweid National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang, 330063, China.
The effect of the processing parameters on the microstructure and mechanical properties of the joint with OM, electronic precision stretching machine and other analysis and detection methods.
In this paper, optimizing the welding parameters with 80 W pulse laser for 0.3 mm SUS 321 sheet, exploring the effect of welding parameters on the microstructure and morphology, and analyzing the characteristics of microstructure and mechanical properties of the joint fabricated with optimized welding parameters.
Dissimilating with the joint welded using conventional fusion welding, no obvious heat affecting zone occurs.
An increasing of hardness in weld zone might be caused by two factors.

Even though, there are some molding factors which could affect products quality.
These factors represent potential sources of variability in the analysis system.
The observed mechanical properties are explained in terms of fiber orientation.
Especially, the buckling of neat PBT is not clear affected by those process factors at all.
Factors Influencing Fibre Orientation and Mechanical Properties in Fibre Reinforced Thermoplastics Injection Mouldings.

The most common causes of failure of the timber structural systems are inadequacy of configuration in relation to the actions, static and dynamic loading, besides slenderness, instability, defects of the wood, severe biotic damages, and accidental factors [1].
A complete set of information regarding wooden member properties and state allows selection of the most suitable conservation procedure.
Results and discussion Mechanical properties of timber are highly related to its chemical composition.
The hydrogen bonds affect in consequence several physical/mechanical properties of wood on the macro scale.
The contribution of hemicelluloses on the overall mechanical properties of wood is rather not significant due to its limited content, but on the other hand the hemicelluloses might be affected by deformations of cellulose chains and lignin zones as resulted to mechanical stresses.

Some key indexes that affect the properties of segment were tested, such as impermeability, volume stability, mechanical property, etc.
Furthermore, the mechanical properties of concrete cover and concrete structure layer met the project requirement perfectly, ensuring the higher durability and longer service-life of HCCS effectively.
Comparing to industry and civilian construction under the open air, the factors affecting structural durability are more complex in tunnel construction, which is often exposed to all kinds of environmental effects resulted from not only the internal air but also the external soil and groundwater [2].
Furthermore, this investigation tested some key indexes such as impermeability, volume stability and mechanical property, which usually affect the properties of concrete segment, appraising the service life and properties of HCCS based on the data analysis in a series of experimental studies.
Test and results of mechanical properties.

The processing techniques employed in the fabrication of magnesium alloys significantly affect their microstructure and mechanical properties.
Strain rate sensitivity is another critical factor affecting the mechanical properties of magnesium alloys.
Effects of Microstructural Factors on Corrosion Behavior of As-Extruded Mg-Sn-Zn Alloys in Immersion and Salt Spray Environments.
Enhancing mechanical properties of an Mg–Zn–Ca alloy via extrusion.
Effect of rolling treatment on microstructure, mechanical properties, and corrosion properties of WE43 alloy.

Introduction The usefulness of steel Mn-Al in welded constructions requires the assessment of factors connected with weldability of those steels, and in particular, the changes of structure occurring in welded joint under the influence of heat of welding, determining the resistance to cracking and conditions of welding and bonding which meets the required mechanical and useable properties [1, 2, 3].
Phase secretion of Mn8Al5 is supported by formulation of ferrite in the shape of needles arranged at an angle of 60 and 120° and is the reason why mechanical properties of welded joints deteriorate [4].
After introduction of chosen types of FeMnAl steel to production, it will be necessary to prepare binding materials with chemical composition which would allow to achieve high mechanical properties.
After introduction of chosen types of Mn-Al steel to production, it will be necessary to develop binding materials with chemical composition which would allow for the achievement good mechanical properties.
Kawulok, Structural and mechanical properties of laboratory rolled steel high-alloyed with manganese and aluminum, Archives of Civil and Mechanical Engineering I2 (2012) 312-317

After spot welding, important changes occur in mechanical and metallurgical properties of the spot welded areas and heat affected zones.
Weldability of dual-phase steel is one of the key factors governing its application in automotive industry.
The spot weld quality is affected by several factors, including: electrical current, pressing force of electrodes, welding time, material of electrodes, thickness and material of the joined sheets.
Experimental studies on weld nugget formation provide relevant information about the influence of different welding parameters on weld properties.
The utilization of a finite element base model to quantify the effects of RSW parameters on weld properties of dual-phase steel was verified in [7].

In this case, the mechanical properties of different elements of a TRB are similar.
The heterogeneity concerns solely the shape factor of the strip cross-sections.
The aim of this study was to show how the differences in the reduction of various strip elements affect the tailoring of mechanical properties.
Comparison of mechanical properties in different strained strip areas for the condition φ1 ≈ const ≈ 0 Fig. 4.
Comparison of mechanical properties in different strained strip areas for the condition ∆φ = const = 0.232 a) b) Fig. 5.

However, it is well known that microstructure and mechanical properties in different regions of weld joint are highly inhomogeneous.
Consequently, the global mechanical properties is strongly affected by the local mechanical properties for a welded joint.
The aim of this paper is to determine the local mechanical properties of base metal, weld metal and HAZ of the A7N01 aluminium alloy.
Tensile properties.
Peterson's stress concentration factors. 2nd ed.: (Wiley, New York 1997

For samples with shorter soaking time, sintering with higher T1 temperature led to better mechanical properties because of its high density.
However, there are rare studies concerning about mechanical properties especially the bending strength.
Chen[8] suggested that the sintering temperature of first stage in the two-step sintering directly affects the porosity and grain size of the material, both of which affect the mechanical and optical properties.
The density had little effect on the mechanical properties of the sample while the grain size became the dominant factor of the strength of the sample.
(3) The samples prepared at higher T1 temperature showed better mechanical properties due to higher densities.