热处理和深冷循环处理对Zr基块体非晶合金结构和性能的影响  

Effect of heat treatment and cryogenic thermal cycles on structure and properties of Zr-based bulk amorphous alloy

作　　者：赵珍祥 李春燕[1,2] 李新玲 寇生中[1,2] ZHAO Zhen-xiang;LI Chun-yan;LI Xin-ling;KOU Sheng-zhong(State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《中国有色金属学报》2021年第8期2185-2197,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51661016,51861021,51571105)。

摘　　要：采用X射线衍射分析仪(XRD)、差示扫描量热仪(DSC)、万能力学试验机、扫描电子显微镜(SEM)及电化学工作站等研究退火以及深冷循环处理对Zr基块体非晶结构和性能的影响。结果表明:经玻璃转变温度T_(g)及以下温度退火处理后的试样呈非晶态。随着退火时间的延长,合金试样热稳定性减弱、耐腐蚀性逐渐增强、压缩塑性呈现先增强后减弱趋势,在500 K(0.6T_(g))保温30 min时塑性应变ε_(p)达16.44%。退火态(0.6T_()g,保温30min)合金试样经深冷循环处理后仍呈非晶态。随着循环次数的增加,合金试样热稳定性增强、耐腐蚀性逐渐增强、压缩塑性逐渐优化,当循环90次时塑性应变ε_(p)达19.05%。综上所述可知,适当的退火处理工艺与深冷循环处理可以有效地提升Zr基块体非晶合金性能。The effects of annealing and cryogenic thermal cycles on the structure and properties of Zr-based bulk amorphous alloys were studied by X-ray diffraction(XRD)and differential scanning calorimeter(DSC),universal mechanical testing machine,scanning electron microscope(SEM)and electrochemical workstation.The results show that the structures of samples after annealed at glass transition temperature(T_(g))and below T_(g) are all amorphous.With the increase of annealing time,the thermal stability of the alloy decreases,the corrosion resistance gradually increases,and the mechanical properties increase first and then decrease.The plastic strain ε_(p) reaches 16.44%at 500 K(0.6T_(g))for 30 min.The annealed alloy(0.6T_(g),holding for 30 min)is still amorphous after cryogenic cycle treatment.With the increase of cycle times,the thermal stability,corrosion resistance and mechanical properties of the alloy samples are improved gradually.The plastic strain ε_(p) reaches 19.05%after 90 cycles.Generally speaking,proper annealing process and cryogenic cycle treatment conditions can be used as effective methods to improve the properties of the alloy.

关 键 词：ZR基块体非晶合金 退火处理 深冷循环处理 原子结构 力学性能 

分 类 号：TG139[一般工业技术—材料科学与工程]