挤压比对AZ42合金板材组织和力学性能的影响

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI:10.1016/S1003-6326(24)66737-3

Song-ke XIAO , Xiao-jie ZHOU , Gang ZENG , Hong-chao XIAO , Xin-kai KANG , Xian-zheng LU , Xiao-min CHEN , Jian ZHANG

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引用次数: 0

摘要

采用光学显微镜、扫描电镜、能谱分析和电子背散射衍射等方法，研究了Mg - 4.5Al - 2.5Zn - 0.3Mn - 0.2Ca （wt.%，简称AZ42）合金在挤压（挤压比分别为28、20和11.5）和峰时效状态下的显微组织和力学性能。结果表明：挤压形成了典型的基纤维织构和第二相的流线；所有样品均表现出最低的基滑施密德因子（SFb）和优异的拉伸屈服强度（TYS）沿挤压方向（ED）。挤压比为20时，试样的平均晶粒尺寸最大，但SFb最小，弥补了晶粒粗化的缺点，保持了强度。175℃峰时效48 h后，挤出比为20的样品在各方向上均表现出最佳的TYS。希望为优化AZ42合金的变形参数提供有用的信息。

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Effect of extrusion ratio on microstructure and mechanical properties of AZ42 alloy sheet

The microstructure and mechanical properties of Mg−4.5Al−2.5Zn−0.3Mn−0.2Ca (wt.%, designated as AZ42) alloys in extruded (at extrusion ratios of 28, 20 and 11.5) and peak-aged states were investigated, by using optical microscopy, scanning electron microscopy, energy dispersive spectrometry and electron backscatter diffraction. The results show that extrusion produces a typical basal fiber texture and streamlines of second phases. All samples exhibit the lowest Schmid factor of basal slip (SF_b) and the superior tensile yield strength (TYS) along extrusion direction (ED). The sample with extrusion ratio of 20 exhibits the largest average grain size, but the smallest SF_b which compensates for the disadvantage of grain coarsening and maintains the strength. After being peak-aged at 175 °C for 48 h, the sample with the extrusion ratio of 20 shows the optimal TYS along all the directions, compared to the other samples. This hopes to provide useful information for optimizing the deformation parameters of the AZ42 alloys.

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.