| MA组元对焊接热影响区粗晶区断裂行为的影响 |
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| 引用本文： | 荆洪阳,霍立兴.MA组元对焊接热影响区粗晶区断裂行为的影响[J].天津大学学报(自然科学与工程技术版),1997,30(4):485-488. |
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| 作者姓名： | 荆洪阳 霍立兴 |
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| 作者单位： | 机械工程系 |
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| 基金项目： | 国家教委优秀青年教师基金 |
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| 摘 要： | 将高强钢焊接热影响区中硬化组织ＭＡ组元视作局部硬化区，采用二维有限元数值方法讨论了含ＬＨＺ材料的断裂机理。结果表明，含细长ＭＡ的热影响区比含块状ＭＡ的热影响区容易产生裂纹，这一结果在高强钢焊接影响区ＣＴＯＤ试验中得到证实，因此控制ＭＡ组元形状能够改善焊接影响区的韧性。
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| 关 键 词： | 局部硬化区 MA组元 断裂 焊接 热影响区 粗晶区 |
EFFECT OF MA CONSTITUENT ON FRACTURE BEHAVIOR OF WELD HAZ |
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| Jing Hongyang,Huo Lixing,Zhang Yufeng.EFFECT OF MA CONSTITUENT ON FRACTURE BEHAVIOR OF WELD HAZ[J].Journal of Tianjin University(Science and Technology),1997,30(4):485-488. |
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| Authors: | Jing Hongyang Huo Lixing Zhang Yufeng |
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| Institution: | Dept. of Mechanical Eng. |
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| Abstract: | Two dimensional FE analysis has been used to investigate the fracture mechanism of the material containing the LHZ (local hard zone) corresponding to MA constituent in the weld HAZ of high strength steel. The results show that the slender MA constituent is more sensitive to microcrack formation than the blocky one. This was confirmed by a CTOD test on the weld HAZ of a high strength steel. Hence, it is effective to improve the toughness in the weld HAZ by controlling the shape of MA constituent. |
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| Keywords: | local hard zone MA constituent fracture behavior |
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