Effects of Multi-stage Deformation Aging on Microstructure and Mechanical Properties of Cu-Al-Ni Alloy

Guo Yunlong; Zhao Yuhong; Yang Xiaomin; Gu Tao; Xu Fengqiang; Wu Li; Hou Hua

doi:10.15980/j.tzzz.2021.04.013

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Effects of Multi-stage Deformation Aging on Microstructure and Mechanical Properties of Cu-Al-Ni Alloy
Vol. 41, Issue 4, Pages: 454-457(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.04.013

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[1]郭云龙,赵宇宏,杨晓敏,顾涛,徐凤强,武立,侯华.多级变形时效对Cu-Al-Ni合金微观组织和力学性能的影响[J].特种铸造及有色合金,2021,41(04):454-457.

Guo Yunlong, Zhao Yuhong, Yang Xiaomin, et al. Effects of Multi-stage Deformation Aging on Microstructure and Mechanical Properties of Cu-Al-Ni Alloy. [J]. Special Casting & Nonferrous Alloys 41(4):454-457(2021)
[1]郭云龙,赵宇宏,杨晓敏,顾涛,徐凤强,武立,侯华.多级变形时效对Cu-Al-Ni合金微观组织和力学性能的影响[J].特种铸造及有色合金,2021,41(04):454-457. DOI： 10.15980/j.tzzz.2021.04.013.

Guo Yunlong, Zhao Yuhong, Yang Xiaomin, et al. Effects of Multi-stage Deformation Aging on Microstructure and Mechanical Properties of Cu-Al-Ni Alloy. [J]. Special Casting & Nonferrous Alloys 41(4):454-457(2021) DOI： 10.15980/j.tzzz.2021.04.013.

摘要

采用热机械处理方法

针对经两次变形时效的低层错能Cu-Al-Ni合金的微观组织和力学性能演变进行了研究。在综合工艺为单向冷轧80%后在350℃下保温60min

然后冷轧50%

最后在350℃下时效15min时

合金试样获得了最佳的强度和塑性匹配

其强度可达774.35MPa

伸长率为5.29%

其强化可以归因于形变强化和析出强化。经XRD分析

合金在时效过程中形成了沉淀相NiAl。退火处理后

合金的伸长率持续增加

经分析这是位错恢复、组织粗化和细小析出物的弥散分布所致。

Abstract

The evolution of microstructure and mechanical properties of low stacking fault energy Cu-Al-Ni alloy after twice deformation and aging were investigated by means of thermomechanical treatment.When the comprehensive process is unidirectional cold-rolled for 80% and holding at 350 ℃for 60 min

then cold-rolled for 50%and aging at 350 ℃ for 15 min

the matching of strength and plasticity of the samples is desirable

where the strength can reach 774.35 MPa and the elongation is 5.29%

which can be attributed to deformation strengthening and precipitation strengthening.XRD analysis indicates that NiAl precipitates are generated during aging process.During annealing process

the elongation of the alloy is increased continuously

which is resulted from dislocation recovery

microstructure coarsening and fine precipitate dispersion distribution.