| GH33A合金在蠕变-疲劳交互作用下的裂纹扩展特性 |
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| 引用本文： | 赵建明,刘彦,陶佑卿. GH33A合金在蠕变-疲劳交互作用下的裂纹扩展特性[J]. 材料研究学报, 1990, 4(1): 20-25 |
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| 作者姓名： | 赵建明 刘彦 陶佑卿 |
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| 作者单位： | 常州戚墅堰机车车辆工艺研究所，西南交通大学，西南交通大学 常州市213011 |
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| 基金项目： | 国家自然科学基金,5860316 |
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| 摘 要： | 通过对 GH33A 合金在蠕变与疲劳复合加载条件下的系列试验,发现拉伸保时使蠕变与疲劳发生了交互作用,加快了疲劳裂纹扩展速率,加速裂纹早期进入失稳扩展,大大降低了疲劳寿命。GH33A 合金具有良好的抗蠕变裂纹扩展能力,但疲劳裂纹扩展阻力较低。由此讨论了拉伸保时对裂纹扩展的影响,并对在蠕变-疲劳交互作用下的裂纹扩展模型作了探讨。
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| 关 键 词： | 蠕变-疲劳交互作用 拉伸保时 裂纹扩展 |
| 收稿时间： | 1990-02-25 |
| 修稿时间： | 1990-02-25 |
CHARACTERISTIC OF CRACK PROPAGATION OF GH33A ALLOY UNDER CREEP-FATIGUE INTERACTION |
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| ZHAO JianmingLIU Yan,TAO Youqing. CHARACTERISTIC OF CRACK PROPAGATION OF GH33A ALLOY UNDER CREEP-FATIGUE INTERACTION[J]. Chinese Journal of Materials Research, 1990, 4(1): 20-25 |
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| Authors: | ZHAO JianmingLIU Yan TAO Youqing |
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| Affiliation: | ZHAO Jianming(Qishuyan Locomotive and Rolling Stock Technology Research Institute)LIU Yan;TAO Youqing(Southwestern Jiaotong University) |
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| Abstract: | Based on the tests of tensile-holding under creep and fatigue complex load-ing,the results show that the creep-fatigue interaction takes place.Tensile-hiding acceler-ates the rate of crack propagation(da/dN)and reduces the fatigue life(N_f)greatly.GH33Aalloy possesses good creep crack resistance but low fatigue crack propagation resistance.Effects of tensile-holding on creep-fatigue crack propagation have been discussed and amodel of creep-fatigue crack propagation has been set up for GH33A alloy. |
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| Keywords: | creep-fatigue interaction tensile-holding time crack propagation |
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