Results 121 to 130 of about 79,370 (265)

Establishment of microstructure prediction model for ultrasonic vibration machining of tungsten heavy alloy based on continuum mechanics

Materials & Design
Ultrasonic vibration-assisted machining (UVAM) is key to ultra-precision machining of tungsten heavy alloys. Revealing the microstructure evolution mechanism of tungsten heavy alloys under ultrasonic vibration is crucial for enhancing ion impact ...
Sen Yin, Xinran Liu, Zhicheng Xu, Zhe Li, Hongrui Zhang, Hu Wang, Renke Kang   +6 more
doaj   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Numerical modelling of the aluminium extrusion process and comparison with results obtained from industrially extruded complex sections.

This thesis reports the analysis of extruded products by Forge2009® and EBSD produced by the investigator in the BOAL plant. The 3D FEM module was used to study the required load, the temperature evolution, surface formation of the extrudate and material
Nilsen, Kjell Einar
core  

Microstructure Evolution of Laser Pulse processed Ductile Iron Surface

, 2002
Pulsed laser beam was used to modify surface processing for ductile iron. The microstructures of processed specimen were observed using optical microscope (OM).
Ba FH(巴发海), Yu G(虞钢), 虞钢, Gan CH(甘翠华)   +3 more
core  

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Microstructure of Plastic Bonded Explosives and Its Evolution after Thermal and Mechanical Aggressions

, 2003
Because sensitivity of an explosive is highly controlled by its microstructure, it is very important to examine and characterize it. Both scanning electronic microscopy and polarized light microscopy were chosen to .examine the microstructure of selected
Chen PW, Huang FL, 丁雁生
core  

Characterization of physical metallurgy of quenching and partitioning steel in pulsed resistance spot welding: A simulation-aided study

Journal of Advanced Joining Processes
This study mainly focuses on the microstructure evolution of QP980 steel during resistance spot welding and its influence on the mechanical performance of resistance spot welds which is a critical influencing factor on the quality of body-in-white at the
Ali Bahmani, Vahid Feizollahi, Rouholah Ashiri   +2 more
doaj   +1 more source

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Precision control of microstructure variation and tensile properties in dissimilar friction stir lap welding joints using an adjustable tool

Scientific Reports
Friction-assisted plastic deformation at the joint interface is essential for achieving the desired joint properties in dissimilar friction stir lap welding (FSLW) of aluminum alloy (Al) with steel (Fe).
Amlan Kar, Yoshiaki Morisada, Abhishek Sharma, Hidetoshi Fujii   +3 more
doaj   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source