冷轧变形对喷射成形Al-Zn-Mg-Cu-Cr合金显微组织演变及力学性能的影响

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中文摘要：研究固溶后、时效前冷轧变形对喷射成形Al-9.8Zn-2.3Mg-1.73Cu-0.13Cr(质量分数,％)挤压态合金显微组织演变及力学性能的影响.采用SEM、TEM和EBSD对合金的显微组织进行表征,并通过拉伸试验研究合金的力学性能.结果表明,与未经冷轧变形的T6样品(D0-T6)的晶粒尺寸(4.23 μm)相比,经25％冷轧变形的T6样品(D1-T6)的晶粒尺寸减小到3.35 μm,表明冷轧变形的引入细化了在固溶过程中长大的晶粒.由于细小弥散的析出相、高密度位错和晶粒细化的共同作用,D1-T6样品的屈服强度和抗拉强度分别达到663和737 MPa.与挤压态样品和D0-T6样品相比,D1-T6样品的屈服强度分别提高了 415和92 MPa.

外文标题：Effect of cold rolling deformation on microstructure evolution and mechanical properties of spray formed Al-Zn-Mg-Cu-Cr alloys

外文摘要：The impact of cold rolling deformation,which was introduced after solid solution and before aging treatment,on microstructure evolution and mechanical properties of the as-extruded spray formed Al-9.8Zn-2.3Mg-1.73Cu-0.13Cr(wt.％)alloy,was investigated.SEM,TEM,and EBSD were used to analyze the microstructures,and tensile tests were conducted to assess mechanical properties.The results indicate that the D1-T6 sample,subjected to 25％cold rolling deformation,exhibits finer grains(3.35 μm)compared to the D0-T6 sample(grain size of 4.23 μm)without cold rolling.Cold rolling refines the grains that grow in solution treatment.Due to the combined effects of finer and more dispersed precipitates,higher dislocation density and smaller grains,the yield strength and ultimate tensile strength of the D1-T6 sample can reach 663 and 737 MPa,respectively.In comparison to the as-extruded and D0-T6 samples,the yield strength of the D1-T6 sample increases by 415 and 92 MPa,respectively.

外文关键词：

Al-Zn-Mg-Cu alloyspray formingmicrostructure evolutionmechanical propertiesstrengthening mechanism

作者：

范才河、李彝会、吴琴、欧玲、胡泽艺、倪雨朦、阳建君

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作者单位：

湖南工业大学材料与先进制造学院,株洲 412007

关键词：

Al-Zn-Mg-Cu合金喷射成形显微组织演变力学性能强化机理

基金：

National Natural Science Foundation of ChinaScience and Technology Innovation Leaders Projects in Hunan Province,China

项目编号：

522711772021RC4036

出版年：

2024

DOI：

10.1016/S1003-6326(24)66552-0

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)