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
Main Authors 向紫琪, 李周, 雷前, 肖柱, 庞咏
Format Journal Article
LanguageChinese
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
Subjects
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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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.
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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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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