首页|利用磁场深过冷处理避免GH605合金强度-塑性的失衡

利用磁场深过冷处理避免GH605合金强度-塑性的失衡

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磁场下的过冷处理(UMF)是一类有效调控钴基合金微观结构和性能的方法.通过UMF处理同时提升GH605钴基高温合金的强度和塑性.结果表明,在UMF处理后,合金的晶粒显著细化,基体相固溶度增加,且合金的屈服强度提升.在原始锻态合金中,位错滑移为主要的变形机制;经过UMF处理后,多种变形机制如层错、孪生、位错滑移及其交互作用在压缩变形过程中被激活,导致合金的强度和塑性同时提高.此外,经UMF处理后,可获得沿晶界析出的硬质Laves相,该硬质相可有效阻碍压缩变形过程中裂纹的扩展.
Evading strength-ductility trade-off of GH605 alloy using magnetic field-assisted undercooling treatment
Undercooling solidification under a magnetic field(UMF)is an effective way to tailor the microstructure and properties of Co-based alloys.In this study,by attributing to the UMF treatment,the strength-ductility trade-off dilemma in GH605 superalloy is successfully overcome.The UMF treatment can effectively refine the grains and increase the solid solubility,leading to the high yield strength.The main deformation mechanism in the as-forged alloy is dislocation slipping.By contrast,multiple deformation mechanisms,including stacking faults,twining,dislocation slipping,and their strong interactions are activated in the UMF-treated sample during compression deformation,which enhances the strength and ductility simultaneously.In addition,the precipitation of hard Laves phases along the grain boundaries can be obtained after UMF treatment,hindering crack propagation during compression deformation.

undercooling treatmentmagnetic fieldGH605 alloystrengthening mechanisms

贺一轩、卜凡、边张驰、相明秀、周蒙蒙、刘栩东、朱雷、王军、李金山

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西北工业大学凝固技术国家重点实验室,西安 710072

西北工业大学先进密封材料与润滑研究中心,西安 710072

西北工业大学上海创新协同中心,上海 201108

西北工业大学超导材料与应用技术研究院,西安 710072

西安理工大学陕西省电工材料与熔(浸)渗透技术重点实验室,西安 710048

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过冷处理 磁场 GH605合金 强化机制

fund of National Key Laboratory for Precision Hot Processing of Metals,ChinaState Key Laboratory of Solidification Processing(NPU)ChinaNational Training Program of Innovation and Entrepreneurship for Undergraduates

61429092001042022-TS-08

2024

10.1016/S1003-6326(24)66561-1

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)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(8)