Results 111 to 120 of about 14,841 (305)

Excellent superplasticity at 800 ℃ achieved via Low-temperature rolling in a novel Ti-44Al-1.5Cr-0.5Re alloy

Materials & Design
This study investigates the microstructural evolution and mechanical properties of a novel Ti-44Al-1.5Cr-0.5Re alloy sheet processed by hot rolling at temperatures ranging from 1050°C to 1250°C.
Xiang Zhang, Bin Tang, Beibei Wei, Biao Ma, Xiangyu Pan, Lei Zhu, Jinshan Li   +6 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

Solidification behaviour and mechanical properties of cast Mg-alloys and Al-based particulate metal matrix composites under intensive shearing

, 2011
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Magnesium alloys, as the lightest of all structural metallic materials, and aluminium-based particulate metal matrix composites (PMMCs), offering unified ...
Tzamtzis, Spyridon
core  

Growth twins within (Al3(Sc,Ti) + α-Al) eutectic cells enable novel grain refinement in recycled Al alloys

Materials & Design
Designing sustainable aluminium alloys with superior mechanical performance requires effective microstructural control during solidification. In this study, a cross-over recycled wrought aluminium alloy system spanning the 1xxx–7xxx series was designed ...
Zhongping Que, Zhichao Niu, Chamini L. Mendis, Raluca Florentina Negrea, Zhongyun Fan   +4 more
doaj   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Microstructural refinement of a cast hypereutectic Al-30Si alloy by friction stir processing

, 2009
Hypereutectic Al-30 wt.% Si alloy was subjected to friction stir processing (FSP) to modify the cast microstructure. FSP reduces the size of undesirable coarse silicon particles, eliminates porosities, and homogenizes and refines the cast microstructure.
SHAH, AK, KASHYAP, BP, RAO, BRK, DESHMUKH, VP, RAO, AG   +4 more
core   +1 more source

New insights into near-surface grain refinement in Ni-containing alloys during high-temperature corrosion at 600 °C

Materials & Design
Ni-alloys often exhibit near-surface microstructural changes due to surface deformation or reaction with the environment. The phenomenon of grain refinement has been of great interest in terms of understanding material behaviour and applicability.
Vicent Ssenteza, Itai Panas, Laura Rioja Monllor, Anton Chyrkin, Tommy Sand, Raveendra Siriki, Torbjörn Jonsson   +6 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Mechanisms of grain refinement and improved kinetic property of nanocrystalline Mg-Ni-La hydrogen storage alloys prepared by nanocrystallization of amorphous

Journal of Magnesium and Alloys
Mgx(Ni0.8La0.2)100-x, where x = 60, 70, 80, exhibiting a nanocrystalline microstructure, were prepared through the crystallization of amorphous alloys.
Y.M. Li, Z.C. Liu, X. Dong, Y.P. Ji, C.J. Shi, G.F. Zhang, Y.Z. Li, J. Kennedy, F. Yang   +8 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source