对轧制态Mg-12Gd-3Y-0.5Zr镁合金的室温低周、超高周疲劳, 高温等温疲劳以及热机械疲劳性能进行了研究, 并对其疲劳失效机制进行了分析。结果表明: 对室温低周疲劳、超高周疲劳来说, 其失效机制主要是夹杂或大的第二相引起的疲劳开裂; 对于低周疲劳, 裂纹萌生于表面或亚表面, 而对于超高周疲劳, 裂纹起源于内部; 该合金的高温等温疲劳与热机械疲劳断裂裂纹都萌生于表面, 其疲劳机制为循环滑移和氧化物夹杂共同作用; 该合金在室温到200 ℃有良好的抗拉强度与疲劳强度; 反相位热机械疲劳寿命比同相位的高。
所属栏目
收稿日期
2010/2/232010/11/17
作者单位
杨晓明:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
杨帆:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
尹树明:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
王渠东:上海交通大学轻合金精密成型国家工程研发中心, 上海 200020
吴世丁:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
张哲峰:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
李守新:中国科学院金属研究所沈阳材料科学国家实验室, 沈阳 110016
备注
杨晓明(1976-), 男, 辽宁沈阳人, 博士研究生。
引用该论文:
YANG Xiao-ming,YANG Fan,YIN Shu-ming,WANG Qu-dong,WU Shi-ding,ZHANG Zhe-feng,LI Shou-xin.Different Fatigue Behaviors of Mg-12Gd-3Y-0.5Zr Magnesium Alloy[J].Materials for mechancial engineering,2011,35(4):41～45
杨晓明,杨帆,尹树明,王渠东,吴世丁,张哲峰,李守新.Mg-12Gd-3Y-0.5Zr镁合金的不同疲劳行为[J].机械工程材料,2011,35(4):41～45
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