高浓度氧化铝弥散强化铜合金的高温力学行为
研究Cu-2.7%Al2O3弥散强化铜合金的微观组织及其高温力学行为.结果表明:细小的Al2O3粒子均匀分布在铜基体当中,部分粗大的A12O3粒子分布在晶界上.拉伸试验表明Hall-Petch机制是影响氧化铝弥散强化铜合金室温屈服强度的主要因素,其高温强度主要由于Al2O3粒子对晶界和亚晶界与位错的强烈钉扎作用.合金在700℃下的抗拉强度和屈服强度分别达到237MPa和226MPa.拉伸断口表明弥散强化铜合金显示出高温脆性.蠕变测试表明400℃下的稳态蠕变速率比700℃下的稳态蠕变速率小很多,其400℃和700℃的蠕变应力指数分别为7和5,蠕变机制为位错核心扩散型和晶格扩散型蠕变....
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Published in | 中国有色金属学报(英文版) Vol. 25; no. 2; pp. 444 - 450 |
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Main Authors | , , , , |
Format | Journal Article |
Language | Chinese |
Published |
中南大学粉末冶金国家重点实验室,长沙410083
2015
中南大学材料科学与工程学院,长沙,410083%中南大学材料科学与工程学院,长沙410083 |
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Abstract | 研究Cu-2.7%Al2O3弥散强化铜合金的微观组织及其高温力学行为.结果表明:细小的Al2O3粒子均匀分布在铜基体当中,部分粗大的A12O3粒子分布在晶界上.拉伸试验表明Hall-Petch机制是影响氧化铝弥散强化铜合金室温屈服强度的主要因素,其高温强度主要由于Al2O3粒子对晶界和亚晶界与位错的强烈钉扎作用.合金在700℃下的抗拉强度和屈服强度分别达到237MPa和226MPa.拉伸断口表明弥散强化铜合金显示出高温脆性.蠕变测试表明400℃下的稳态蠕变速率比700℃下的稳态蠕变速率小很多,其400℃和700℃的蠕变应力指数分别为7和5,蠕变机制为位错核心扩散型和晶格扩散型蠕变. |
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AbstractList | 研究Cu-2.7%Al2O3弥散强化铜合金的微观组织及其高温力学行为.结果表明:细小的Al2O3粒子均匀分布在铜基体当中,部分粗大的A12O3粒子分布在晶界上.拉伸试验表明Hall-Petch机制是影响氧化铝弥散强化铜合金室温屈服强度的主要因素,其高温强度主要由于Al2O3粒子对晶界和亚晶界与位错的强烈钉扎作用.合金在700℃下的抗拉强度和屈服强度分别达到237MPa和226MPa.拉伸断口表明弥散强化铜合金显示出高温脆性.蠕变测试表明400℃下的稳态蠕变速率比700℃下的稳态蠕变速率小很多,其400℃和700℃的蠕变应力指数分别为7和5,蠕变机制为位错核心扩散型和晶格扩散型蠕变. |
Author | 雷前 肖柱 李周 庞咏 向紫琪 |
AuthorAffiliation | 中南大学材料科学与工程学院,长沙,410083%中南大学材料科学与工程学院,长沙410083;中南大学粉末冶金国家重点实验室,长沙410083 |
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Author_FL | Zhou LI Qian LEI Zi-qi XIANG Zhu XIAO Yong PANG |
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DocumentTitle_FL | High temperature mechanical behavior of alumina dispersion strengthened copper alloy with high content of alumina |
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Keywords | high temperature mechanical behavior strengthening mechanism 氧化铝弥散强化合金 蠕变行为 强化机制 copper alloys 断口 alumina dispersion strengthened alloy 铜合金 高温力学行为 creep behavior fracture |
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Publisher | 中南大学粉末冶金国家重点实验室,长沙410083 中南大学材料科学与工程学院,长沙,410083%中南大学材料科学与工程学院,长沙410083 |
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Title | 高浓度氧化铝弥散强化铜合金的高温力学行为 |
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