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in the microstructural refinement of as-cast alloys. High-strain-rate rolling (HSRR) produces more deformed twins and thus provides more nucleation sites for dynamic recrystallization (DRX). The addition... of 235 MPa and the elongation to rupture of 24%. Key words: magnesium alloys; high-strain-rate rolling; dynamic recrystallization; mechanical properties 1 Introduction Magnesium alloys are the lightest......
Comparison of microstructures in electroformed and spin-formed copper liners of shaped charge undergone high-strain-rate deformation FAN Ai-ling(范爱玲)1, LI Shu-kui(李树奎)1, TIAN Wen-huai(田文怀)2... were studied by optical microscopy(OM), electron backscattering Kikuchi patterns(EBSP) technique and transmission electron microscopy(TEM). The deformation was carried out at an ultra-high strain rate......
of Mg alloy AZ31 during a HSR process were investigated by conducting rolling with different imposed reductions in the range of 20%–80% at a high rolling speed of 470 m/min and 400?C. High-strain... Institute of Ferrous Technology, Pohang University of Science and Technology摘 要:High-speed rolling(HSR) is known to improve the workability of Mg alloys......
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Seismic performance of isolation system of rolling friction with springsWEI Biao(魏标)1, DAI Gong-lian(戴公连)1, WEN Ying(文颖)1, XIA Ye(夏烨)2(1. School of Civil Engineering, Central South University, Changsha 410075, China;2. Department of Civil and Environment Engineering, The State University of New Jersey, Piscataway 08854, USA)Abstract:In order to study an isolation system of rolling friction......
Influence on Rolling Contact Fatigue Life of GCr15 Steel Treated by Plasma Immersion Ion Implantation TANG Bao-yin1,SUN Tao1,LIU Dan1,HU Li-guo2,WNAG Lang-ping1,WNAG Xiao-feng1 (1.State key lab...-on-rod testing, the rolling contact fatigue (RCF) life of GCr15 steel treated by PIII technique was studied. During the study, nitrogen plasma was generated and the implantation voltage was varied from 20......
Dynamic recrystallization of electroformed copper liners of shaped charges in high-strain-rate plastic deformationWenhuai Tian, Hongye Gao, Ailing Fan, Xiaoou Shan, and Qi SunDepartment of Materials...;The microstructures in the electroformed copper liners of shaped charges after high-strain-rate plastic deformation were investigated by transmission electron microscopy (TEM). Meanwhile, the orientation......
High-strain-rate superplasticity in oxide ceramics:a trial of microstructural design based on creep-cavitation mechanismsKeijiro HIRAGA,Byung-Nam KIM,Koji MORITA,Hidehiro YOSHIDA,Yoshio SAKKA,Masaaki... defects,diffusivity,dynamic grain growth and the homogeneity of microstructure.On the basis of this conclusion,high-strain-rate superplasticity (defined as superplasticity at a strain rate higher than......