| DD3单晶高温合金疲劳－蠕变复合作用下的形变特点 |
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| 引用本文： | 陈国良,郭宏. DD3单晶高温合金疲劳－蠕变复合作用下的形变特点[J]. 北京科技大学学报, 1995, 0(2) |
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| 作者姓名： | 陈国良 郭宏 |
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| 作者单位： | 北京科技大学新金属材料国家重点实验室 |
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| 摘 要： | 研究了ＤＤ３单晶高温合晶在疲劳－蠕变复合作用下的材料形变特点，分析了ＤＤ３单晶在不同的交变应力和平均应力的组合下材料的动态变形曲线特点，建立了在９３０℃此单晶的疲劳－蠕变交互作用变形类的断裂特征图。研究发现ＤＤ３单晶合金断裂特征图Ｆ区具有较宽的应力范围，而Ｃ区则具有相对较窄的应力范围。这表明ＤＤ３单晶合金具有相对较强的抗蠕变能力和相对较弱的抗疲劳能力。
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| 关 键 词： | 蠕变疲劳，交互作用，耐热合金，单晶，变形 |
Deformation Features of Superalloy DD3 under Fatigue Creep Interaction |
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| Chen Guoliang Guo Hong. Deformation Features of Superalloy DD3 under Fatigue Creep Interaction[J]. Journal of University of Science and Technology Beijing, 1995, 0(2) |
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| Authors: | Chen Guoliang Guo Hong |
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| Abstract: | The deformation features of a nickle-base single crystal superalloy DD3 under fatigue-creep interaction were investigated. The strain rate type fatigue-creep frature machanism map was constrcuted. The maxium stress modified equations were obtained to calculate the minium strain rate for the fixed stress conditions. It is demonstrated that the predicted values compared favourable with the observed values. |
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| Keywords: | creep fatigue interaction heat-resistant alloys single crystals deformation |
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