首页|Au-Sn共晶多层材料的热变形行为及组织演化

Au-Sn共晶多层材料的热变形行为及组织演化

Hot deformation behavior and related microstructure evolution in Au-Sn eutectic multilayers

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研究多层组织Au-20Sn共晶合金在热压缩过程中的变形行为及组织演变.结果表明,合金层状组织在热变形中发生塑性失稳,球化行为会在失稳区域启动并逐步在层片团内蔓延.组织球化优先发生于层片生长方向与压缩方向平行的层片团内部,其球化机制为AuSn/Au5Sn层片内部位错演化牵动的不连续动态再结晶.球化完成后,两等轴相内部的应变积累能力均弱化,变形机制由位错滑移转变为晶界滑动和迁移.基于上述研究,设计Au-20Sn铸态合金的热轧成形实验,并成功制备出厚度为～50μm的箔材.本研究不仅能促进Au-20Sn箔材钎料的发展应用,也将为多层组织合金的变形及组织演变提供理论参考.
Hot compression was performed on a multilayered Au-20Sn eutectic alloy to investigate the deformation behavior and microstructure evolution. During hot compression, microstructural spheroidization was initiated from plastic instability regions, and it was preferentially activated in vertical lamellae with a growth direction parallel to the compressive direction. Continuous dynamic recrystallization associated with lattice dislocations was the mechanism in both AuSn and Au5Sn multilayers. After spheroidization, strain accumulations were weakened in both of the equiaxed phases, and the deformation mechanism was substantially replaced by grain boundary sliding and migration. Based on these findings, hot rolling was conducted on an as-cast Au-20Sn alloy and a foil with a thickness of ～50 μm was successfully prepared. The present study can promote the development of Au-20Sn foils, and provide insights into the deformation behavior and microstructure evolution of multilayered eutectic alloys.

Au-20Sn eutectic alloyintermetallicshot compressionmultilayered structuredeformationspheroidization

毛勇、祝丹丽、何俊杰、邓超、孙莹洁、薛广杰、余恒飞、王琛

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云南大学 材料与能源学院,昆明 650091

云南大学 物理与天文学院,昆明 650091

云南大学 材料基因工程研究中心,昆明 650091

重庆大学 材料科学与工程学院,重庆 400045

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Au-20Sn共晶合金 金属间化合物 热压缩 多层组织 变形 球化

authors are grateful for the financial supports from the National Natural Science Foundation of Chinaauthors are grateful for the financial supports from the National Natural Science Foundation of ChinaPrecious Metal Materials Genome Engineering in Yunnan Province,ChinaPrecious Metal Materials Genome Engineering in Yunnan Province,China

U1502272519012042019ZE001202002AB080001

2021

10.1016/S1003-6326(21)65609-1

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(6)
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