| GH36合金在疲劳和蠕变交互作用下的失效寿命 |
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| 引用本文： | 田长生,乔生儒,陶冶,荣毅超.GH36合金在疲劳和蠕变交互作用下的失效寿命[J].航空学报,1987,8(11):632-636. |
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| 作者姓名： | 田长生 乔生儒 陶冶 荣毅超 |
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| 作者单位： | 西北工业大学
(田长生，乔生儒，陶冶)，西北工业大学(荣毅超) |
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| 摘 要： | 一、前言 航空发动机是在起动-运行-停车的循环状态下工作的,这种循环使其热端部件受到了两种损伤,即由于起动-停车的循环变形而引起的疲劳损伤和在运行过程中,由于持续峰值载荷的作用而引起的蠕变损伤,与单纯疲劳相比,这种疲劳和蠕变交互作用将显著降低构件的寿命。对此,业已提出许多寿命估算方法,其中,虽有些方法较简单,便于工程计算,但其应用还有一定的局限性,而且对交互作用的微观机制尚缺乏深入的研究。
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| 收稿时间： | 1987-03-06; |
THE FAILURE LIFE UNDER COMBINED CREEP AND FATIGUE FOR GH36 |
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| Tian Changsheng,Qiao Shengru,Tao Yie,Rong Yichao.THE FAILURE LIFE UNDER COMBINED CREEP AND FATIGUE FOR GH36[J].Acta Aeronautica et Astronautica Sinica,1987,8(11):632-636. |
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| Authors: | Tian Changsheng Qiao Shengru Tao Yie Rong Yichao |
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| Institution: | Northwestern Polytechnical University |
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| Abstract: | In this paper, cyclic stress-strain behavior for an iron-ba-sed supera-lloy GH36 under combined creep and fatigue at 550℃ was investigated. The experimental results are preliminarily studied. Analysis indicates that the main reason for the dec-rease in failure life with holding time at maximum tensile strain is the increase in creep strain and creep-fatigue interaction, and its microscopic mechanism is that fatigue crack joins the "W" type or "R" type intergranular creep damage. |
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