Effects of Element Y on the Microstructure and Mechanical Properties of AZ91D Magnesium Alloy

Wu Guohua1; Li Guanqun1; Fan Yu1; Ding Wenjiang1; Zhu Yanping1; Li Bo2; Wang Qun2

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Effects of Element Y on the Microstructure and Mechanical Properties of AZ91D Magnesium Alloy
Issue 5, Pages: 260-263(2006)
Published： 2006 ，
DOI：

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[1]吴国华,李冠群,樊昱,丁文江,朱燕萍,李波,王群.Y对AZ91D镁合金组织及力学性能的影响[J].特种铸造及有色合金,2006(05):260-263+253.

Wu Guohua1, Li Guanqun1, Fan Yu1, et al. Effects of Element Y on the Microstructure and Mechanical Properties of AZ91D Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (5):260-263(2006)
[1]吴国华,李冠群,樊昱,丁文江,朱燕萍,李波,王群.Y对AZ91D镁合金组织及力学性能的影响[J].特种铸造及有色合金,2006(05):260-263+253. DOI：

Wu Guohua1, Li Guanqun1, Fan Yu1, et al. Effects of Element Y on the Microstructure and Mechanical Properties of AZ91D Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys (5):260-263(2006) DOI：

摘要

研究了稀土元素钇（Y）对AZ91D镁合金铸态及热处理态的组织和力学性能的影响。结果表明:Y会强烈地细化合金组织

并在合金中生成方块状的Al6Mn6Y相及杆状的Al2Y相。少量的Y能显著提高合金的力学性能

当Y含量（质量分数）达到1.5%时

合金得到最佳的力学性能。另外

含Y的AZ91D合金固溶处理后硬度及抗拉强度皆高于原AZ91D合金

并且Y会推迟镁合金的时效过程

延长时效峰值的到来时间。

Abstract

The effects of yttrium on the microstructure and mechanical properties of as-cast and heat treated AZ91D magnesium alloys were examined. Chinese script Al6Mn6Y phase and spheroidized or bar-like Al2Y phase can be observed in the alloy to intensively refine the structure. The mechanical properties of the AZ91D magnesium alloy can be significantly improved by somewhat Y addition

in which the optimized mechanical properties can be obtained with 1.5% Y addition. Furthermore

both the hardness and tensile strength of the AZ91D magnesium alloy containing Y after solid solution treatment are higher than those of the AZ91D magnesium

meanwhile

the Y can postpone the ageing time to delay the time of the ageing peak.