首页|低温形变热处理制备Mg-6Gd-1Y-0.5Zr合金的力学性能

低温形变热处理制备Mg-6Gd-1Y-0.5Zr合金的力学性能

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对固溶态的Mg-6Gd-1Y-0.5Zr合金进行低温形变热处理,处理工艺包括不同应变量的冷拉伸和随后在200℃进行的峰值时效.结果表明:低温形变热处理合金的时效硬化动力学显著加速,随变形量增大,合金的峰值时效时间大幅度缩短.冷拉伸变形量为10％的合金在200℃峰值时效后的屈服强度、抗拉强度和伸长率分别达到251MPa、296MPa和8％,这些性能大大超过传统商业牌号的耐热镁合金WE54,尽管其总的稀土含量高于GW61K合金.
Mechanical properties of Mg-6Gd-1Y-0.5Zr alloy processed by low temperature thermo-mechanical treatment
An as-solution treated Mg-6Gd-1Y-0.4Zr alloy was processed by low temperature thermo-mechanical treatments (LT-TMT),including cold tension with various strains followed by aging at 200 ℃ to peak hardness.The results show that the precipitation kinetics of the alloy experienced LT-TMT is greatly accelerated and the aging time to peak hardness is greatly decreased with increasing tensile strain.The tensile yield strength,ultimate tensile strength and elongation at room temperature of the alloy after cold tension with strain of 10％ and peak aging at 200 ℃ are 251 MPa,296 MPa and 8％,respectively,which are superior to the commercial heat-resistant WE54 alloy,although the latter has a higher rare earth element content.

Mg-Gd-Y-Zr alloylow temperature thermo-mechanical treatmentprecipitation hardeningmechanical properties

李德江、曾小勤、谢艳才、吴玉娟、丁文江、陈彬

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上海交通大学材料科学与工程学院金属基复合材料国家重点实验室,上海200240

上海交通大学材料科学与工程学院分析测试中心,上海200240

Mg-Gd-Y-Zr合金 低温形变热处理 时效硬化 力学性能

国家自然科学基金国家自然科学基金国家自然科学基金Postdoctoral Science Foundation of ChinaPostdoctoral Science Foundation of ChinaPostdoctoral Science Foundation of China

5097108951171113510010722012M51108920090460615201003267

2012

10.1016/S1003-6326(11)61470-2

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)

CSTPCDCSCDSCIEI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2012.22(10)
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