Temperature dependent fatigue crack propagation in a single crystal Ni-base superalloy affected by primary and secondary orientations

10.1016/j.msea.2018.03.090

2018-03-27

The effects of temperature and crystal orientations on fatigue crack propagation in a single crystal Ni-base superalloy were experimentally investigated at room temperature, 450°C and 700°C. Four types of C(T) specimens with different combinations of crystal ...

Effect of Travel Speed and Stress Relief on Thin Ti-6Al-4V Laser Wire Deposits

10.1016/j.msea.2018.03.101

2018-03-27

The effect of two travel speeds on thin Ti-6Al-4V buildups produced by Laser Wire Deposition (LWD) has been investigated. A travel speed set at 1.4 mm/s promoted recrystallization of columnar prior β grains into horizontal prior β grains. It was associated wi...

The sequential twinning-transformation induced plasticity effects in a thermomechanically processed high Mn austenitic steel

10.1016/j.msea.2018.03.102

2018-03-27

Different initial microstructures with various bimodal grain size distributions (BGSD) were produced in a high Mn austenitic steel through applying a predetermined set of thermomechanical processing cycles. The corresponding room temperature mechanical proper...

Effects of concurrent strain induced martensite formation on tensile and texture properties of 304L stainless steel of varying grain size distribution

10.1016/j.msea.2018.03.099

2018-03-27

Ultrafine grained austenitic stainless steel, with two different types of grain size distributions, was studied for tensile deformation behavior. Tensile deformed specimens were analyzed by electron backscatter diffraction using scanning electron microscope. ...

Fatigue behavior of high-strength steel S135 under coupling multi-factor in complex environments

10.1016/j.msea.2018.03.093

2018-03-26

High-strength S135 drill pipe is an important component in the oil and gas exploration and development of deep and ultradeep wells under complicated environments. It is of great significance to the study on the corrosion fatigue fracture of high-strength stee...

Novel transient liquid phase bonding through capillary action for high-temperature power devices packaging

10.1016/j.msea.2018.03.097

2018-03-26

A novel transient liquid phase (TLP) bonding was achieved by using a hybrid solder preform containing porous Cu interlayer, which was prepared by compacting a thin layer of Cu powder with Sn foils. This method combines the advantages of the conventional TLP b...

Phase stability and mechanical properties of AlHfNbTiZr high-entropy alloys

10.1016/j.msea.2018.03.071

2018-03-24

Refractory high-entropy alloys (HEAs) have potential to be high temperature structural materials, but poor ductility and phase stability have been remaining the key issues for their application. In this paper, the phase compositions, phase stability and mecha...

Microstructure and mechanical properties of friction stir welded oxide dispersion strengthened AA6063 aluminum matrix composites enhanced by post-weld heat treatment

10.1016/j.msea.2018.03.094

2018-03-23

Oxide dispersion strengthened (ODS) AA6063 aluminum matrix composites (AMCs) sheets fabricated by a new method were successfully joined by friction stir welding (FSW) technique, and post-weld heat treatment (PWHT) was also performed to enhance the mechanical ...

Influence of Texture and Grain Refinement on the Mechanical Behavior of AA2219 Fabricated by High Shear Solid State Material Deposition

10.1016/j.msea.2018.03.088

2018-03-23

Issues with rapid grain growth, hot cracking and poor ductility have hindered the additive manufacturing and repair of aluminum alloys. Therefore, this is the first investigation to spatially correlate the processing-structure-property relations of a precipit...

Effects of loading conditions on twin characteristics in an extruded Mg-Zr alloy

10.1016/j.msea.2018.03.095

2018-03-23

In the present study, compression and compression-tension tests of different strain levels (maximum 4%) were carried out on an extruded Mg-Zr alloy rod along the extrusion direction. The effects of loading conditions (strain level and strain path) on twin cha...