| 残余应力对09CuPCrNi钢焊接接头近门槛值域内疲劳裂纹扩展行为的影响 |
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| 引用本文： | 邱海,李广铎. 残余应力对09CuPCrNi钢焊接接头近门槛值域内疲劳裂纹扩展行为的影响[J]. 大连铁道学院学报, 1992, 0(4) |
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| 作者姓名： | 邱海 李广铎 |
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| 作者单位： | 大连铁道学院材料工艺系，大连铁道学院材料工艺系 |
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| 摘 要： | 本文采用应力松驰法测定了紧凑拉伸试样中,垂直于裂纹扩展方向的横向焊接残余应力的分布,并导出了计算公式。同时,根据国标GB6398—86,采用逐级降载法测定了09CuPCrNi钢焊缝金属及经过消除应力处理的焊缝金属的门槛值,并发现裂纹在较大的残余压应力的作用下闭合严重,当应力比只≤0.8时,残余压应力使门槛值增大,且R值越小,影响越显著;当R>0.8时,残余压应力对门槛值无影响。
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| 关 键 词： | 焊接接头区 残余应力 疲劳裂纹/近门槛值 09CuPCrNi钢 |
A Influence of Residual Stress on the Fatigue Crack Propagation Behavior in Near-Threshold Regime for Welding Joints of 09CuPCrNi Steel |
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| Qiu Hai Li Guangduo Dept.of Material Technology. A Influence of Residual Stress on the Fatigue Crack Propagation Behavior in Near-Threshold Regime for Welding Joints of 09CuPCrNi Steel[J]. Journal of Dalian Railway Institute, 1992, 0(4) |
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| Authors: | Qiu Hai Li Guangduo Dept.of Material Technology |
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| Affiliation: | Qiu Hai Li Guangduo Dept.of Material Technology |
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| Abstract: | |
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| Keywords: | weld regions residual stress fatigue crack/near-threshold value 09CuPCrNi steel |
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