摘要
本研究通过对一种镍基合金进行大变形异步与同步轧制,制备了纳米组织材料,研究了退火处理对纳米组织镍基合金材料的组织与力学性能的影响。结果表明,大变形轧制后材料的晶粒细化至约50nm,大变形轧制后的材料出现(2 2 0)晶面择优取向,退火温度对该取向影响不大。所制备的超细晶材料具有良好的组织热稳定性,在700℃下退火,晶粒尺寸约150nm,在800℃以下退火1h,晶粒尺寸仍然能够保持在250nm以下。分析认为,超细晶镍基合金材料的组织稳定性与γ′相的析出所起到的钉扎作用有直接关系。
Abstract： Nano-grained （NG） alloy was obtained through symmetric and asymmetric rolling at room temperature.The effects of annealing on microstructure and mechanical properties of nano-grained Ni- based alloy were investigated. It was found that, after severe cold rolling, the NG material with an average grain size about 50 nm and （2 2 0） preferential orientation was fabricated. In addition, after annealing at 700 ℃, the grain size was about 150 nm and it was still below 250 nrn even after annealing at 800℃, which shows that the nano-grained material has high thermal stability and is attributed to precipitation of y1 phase.
作者
郭润江
孙衍乐
单默昆
付立铭
郭平生
单爱党
GUO Runjiang SUN Yanle SHAN Mokun FU Liming GUO Pingsheng SHAN Aidang(College of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China College of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China College of Physical and Technology, Guangxi Normal University, Guilin Guangxi 541004, China)
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2016年第3期95-101,共7页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家"十二五"水体污染控制与治理科技重大专项(2014ZX07214-002)
关键词
镍基合金
大变形轧制
纳米晶
热处理
Ni-based alloy
severe rolling
nano-grain material
heat treatment
