摘要
对Al-1. 0Mg合金进行了高压扭转和195℃退火处理,并通过显微硬度仪、XRD、TEM等研究了高压扭转Al-1. 0Mg合金的热稳定性。结果表明,经过10 min、30 min和90 min退火后,合金的硬度相较高压扭转后未退火试样的硬度分别降低了21. 6%、27. 2%和34. 4%。随着退火时间的延长,基体中的宏观应力逐渐消除,晶格畸变程度逐渐降低,晶粒尺寸逐渐增大,但硬度下降的速度逐渐减小。经195℃退火90 min后,高压扭转Al-1. 0Mg合金的硬度为82HV,仍然是未变形合金的两倍以上。
Al-1.0Mg aluminum alloy was processed by high pressure torsion(HPT)and annealed at 195℃.The thermal stability of the alloy was investigated by microhardness tests,X-ray diffraction(XRD)analysis and transmission electron microscope(TEM).The results indicated that the hardness of HPT Al-1.0Mg alloy decreased by 21.6%,27.2%and 34.4%after annealing for 10 min,30 min and 90 min compared to the HPT Al-1.0Mg alloy without annealing.With the extension of annealing duration,the macroscopic stress gradually eliminated,the lattice distortion in the matrix gradually decreased,and the grain size of the alloy after annealing treatment increased steadily,while the speed of hardness reduction slowed down.The hardness of HPT Al-1.0Mg alloy after annealing at 195℃ for 90 min still remained as high as 82HV,which is over two times of that of the undeformed alloy.
作者
王子博
刘满平
姜奎
秦希
章勇
王圣楠
陈健
WANG Zibo;LIU Manping;JIANG Kui;QIN Xi;ZHANG Yong;WANG Shengnan;CHEN Jian(Jiangsu Province Key Laboratory of High-end Structural Materials,School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第2期321-324,共4页
Materials Reports
基金
国家自然科学基金-联合基金培育项目(U1710124)
江苏省高校自然科学研究重大项目(14KJA430002)~~
关键词
高压扭转
铝合金
退火处理
热稳定性
high pressure torsion
aluminum alloy
annealing treatment
thermal stability
