金属学报  1986, Vol. 22 Issue (6): 58-66

论文 本期目录 | 过刊浏览 |

15MnVN钢焊接区组织的解理机理及解理断裂统计判据

侯纯孝;蔡其巩;苏毅;郑秀瑗

清华大学机械系;冶金部钢铁研究总院;清华大学机械系;清华大学机械系

MECHANISM AND STATISTICAL CRITERION OF CLEAVAGE FRACTURE OF MICROSTRUCTURE IN WELDED 15MnVN STEEL

by HOU Chunxiao; CAI Qigong; SU Yi; ZHENG Xiuyuan (Tsinghua University; Beijing)

侯纯孝;蔡其巩;苏毅;郑秀瑗. 15MnVN钢焊接区组织的解理机理及解理断裂统计判据[J]. 金属学报, 1986, 22(6): 58-66.
, , , . MECHANISM AND STATISTICAL CRITERION OF CLEAVAGE FRACTURE OF MICROSTRUCTURE IN WELDED 15MnVN STEEL[J]. Acta Metall Sin, 1986, 22(6): 58-66.

摘要 参考文献 相关文章 Metrics 全文: PDF(1257 KB)   摘要: 通过对具有15 MnVN钢模拟焊接过热区组织的光滑、缺口及预置裂纹试样的试验,以及利用光学和电子显微镜对组织、裂纹源等的观察,明确了这类组织的解理是由M-A组元形成的裂纹核引发的,并由此提出这类组织解理断裂的模型,推导出了三种试样的解理断裂统计判据.这判据将材料的断裂韧性与其它力学性能如屈服强度、硬化指数以及累积断裂概率P的关系定量地表达出来,并可以预测从下平台到过渡温度区间的断裂韧度与温度的关系,预测值与实验值相符. Abstract：Three kinds of simulated HAZ specimens of 15MnVN steel were tested. Based on metallographic and SEM examinations on fractured specimens, it has been clarified that the cleavage fracture initiates at the crack nuclei formed in M-A constituents. A statistical criterion of cleavage fracture for the specimens has been derived. It describes quantitatively the relationship among K_(IC)(or J_(IC)), σ_y, the hardening exponent, n, and the cumulative fracture probability, P, and the relationship between J_(IC) and T, by which the predicted values are in good agreement with the experimental results. 收稿日期: 1986-06-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 侯纯孝 蔡其巩 苏毅 郑秀瑗 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1986/V22/I6/58 1 Ritchie, R. O.; Knott, J. F.; Rice, J. R., J. Mech. Phys. Solids, 21(1973) , 395． 2 Curry, D.A.; Knott, J.F., Met. Sci., 13(1979) , 341． 3 Pineau, A., Advances in Fracture Research, Vol. 2, Proc. of the 5th Int. Conf. on Fracture, ICF5, Paris, 1981, 553． 4 Weibttll, W., A Statistical Theory of the Strength of Materials, Roy. Swed. Inst. Eng. Research, №151, 1939． 5 Curry, D.A., Met. Sci., 14(1980) , 319． 6 McMeeking, R.M., J. Mech. Phys. Solids, 25(1977) , 357． 7 Tracey, D.M., Trans. ASME, Ser. H, J. Eng. Mater. Technol., 98(1976) , 146． 8 Uhlmann, W.; Knesl, Z.; Kuna, M.; Bilek, Z., Int. J. Fract., 12(1976) , 507． 9 Griffiths, J.R.; Owen, D. R.J., J. Mech. Phys. Solids, 19(1971) , 419． 10 侯纯孝;蔡其巩;苏毅;郑秀瑗,第四届全国断裂学术会议文集,1985。) No related articles found! Viewed Full text Abstract Cited   Shared      Discussed