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| RELATIONSHIP BETWEEN FRACTURE TOUGHNESS OF 30CrMnSiNi2A STEEL AND SUBSTRUCTURE OF MARTENSITE OR OTHER DECOMPOSED PRODUCTS |
| ZHU Jian; GE Qinglin (Shanghai Institute of Metallurgy; Academia Sinica) |
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Cite this article:
ZHU Jian; GE Qinglin (Shanghai Institute of Metallurgy; Academia Sinica). RELATIONSHIP BETWEEN FRACTURE TOUGHNESS OF 30CrMnSiNi2A STEEL AND SUBSTRUCTURE OF MARTENSITE OR OTHER DECOMPOSED PRODUCTS. Acta Metall Sin, 1983, 19(1): 65-149.
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Abstract Fine structure of tempered martensite of ultra-high strength steel 30CrMnSiNi2A was investigated under TEM. It was found that two kinds of martensite, the twinned type and the dislocated type were existed in the quenched state. Fracture toughness of this steel tempered below 400℃ depends primarily on the species and morphology of the products of martensite decomposition and has little concerned with the presence of twinned martensite. The severe embrittlement at 400℃ temper is attributed to the elimination of the homogeneously distributed χ-Fe_2C with the simultaneous preferred precipitation of the brittle Fe_3C phase. The high temperature temper brittleness at 550℃ is induced by the solute segregation(as alloyed carbide)along grain boundary as well as dislocation pinning by fine precipitates. Upon further increase in tempering temperature however, the precipitate phases are more or less spheroidized which, together with the matrix recovery, cause the fracture toughness to increase.
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Received: 18 January 1983
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1 Parker, E. R.; Zackay, V. F., Eng. Fract. Mech., 7(1975) , 371．
2 Mcmahon, J. A.; Thomas, G., The Microstructure and Design of Alloys, Proc. 3rd Int. Conf. on the Strength of Metals and Alloys, Vol.1, Cambridge, England, 1973, p. 180．
3 Osborne, D. E.; Embury, J. D., Metall. Trans., 4(1973) , 2051．
4 Huang, Der-Hung; Thomas, G., ibid., 2(1971) , 1587．
5 Zackay, V. P.; Parker, E. R.; Wood, W. E., The Microstructure and Design of Alloys, Pro. 3rd Int. Conf. on the Strength of Metals and Alloys, Vol. 1, Cambridge, England, 1973, p.175．
6 Wood, W. E., Eng. Fract. Mech., 7(1975) , 219．
7 Lai, G. Y.; Wood, W. E.; Clark, R. A.; Zackay, V. F.; Parker, E.R., Metall. Trans., 5(1974) , 1663．
8 Curry, D. A.; Knott, J. F., Met. Sci., 13(1979) , 341．
9 Carr, E. L.; Bichler, D.; Connolly, A.; Dragen, R.; Faller, J.; Johari O.; Morais, R.; Parker, M. T.; Sailors, R. H., Applications of Electron Microfractography to Materials Research, Ed. Wiebo, W., ASTM STP, №493,(1971) , p. 36．
10 Hahn, G. T.; Kawninen, M. F.; Rosenfield, A. R., Annu, Rev. Mater. Sci., 2(1972) , 381．
11 Bradeshia, H. K. D. H.; Edmonds, D. V., Met. Sci., 13(1979) , 325．
12 Thomas, G., Iron Steel Int., 46(1973) , 451．
13 今井勇之进;小仓次夫;井上明久,铁钢,59(1973) ,261．
14 中国科学院上海冶金研究所断裂韧性组,1976年北京断裂力学交流会第二次会议文集,1976年,p.12．
15 Youngblood, J. L.; Raghavan, M., Metall. Trans., 8A(1977) , 1439．
16 曲哲;郭可信,金属学报16(1980) ,371．
17 雷廷权;唐之秀;苏梅;金属学报.18(1982) ,485． |
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