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题名: Effects of extrusion and heat treatments on microstructure and mechanical properties of Mg-8Zn-1Al-0.5Cu-0.5Mn alloy
作者: Zhu, Shao-zhen;  Luo, Tian-jiao;  Zhang, Ting-an;  Liu, Yun-teng;  Yang, Yuan-sheng
发表日期: 2017
摘要: The effects of extrusion and heat treatments on the microstructure and mechanical properties of Mg-8Zn-1Al-0.5Cu-0.5Mn magnesium alloy were investigated. Bimodal microstructure is formed in this alloy when it is extruded at 230 and 260 degrees C, and complete DRX occurs at the extruding temperature of 290 degrees C. The basal texture of as-extruded alloys is reduced gradually with increasing extrusion temperature due to the larger volume fraction of recrystallized structure at higher temperatures. For the alloy extruded at 290 degrees C, four different heat treatments routes were investigated. After solution + aging treatments, the grains sizes become larger. Finer and far more densely dispersed precipitates are found in the alloy with solution + double-aging treatments compared with alloy with solution + single-aging treatment. Tensile properties are enhanced remarkably by solution + double-aging treatment with the yield strength, tensile strength and elongation being 298 MPa, 348 MPa and 18%, respectively. This is attributed to the combined effects of fine dynamically recrystallized grains and the uniformly distributed finer precipitates.
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Zhu, Shao-zhen,Luo, Tian-jiao,Zhang, Ting-an,et al. Effects Of Extrusion And Heat Treatments On Microstructure And Mechanical Properties Of Mg-8zn-1al-0.5cu-0.5mn Alloy[J]. Transactions Of Nonferrous Metals Society Of China,2017,27(1):73-81.

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