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| FORMATION OF TENSILE FLAKE IN SUPER STRENGTH STEEL |
| by LUO Enzhou; LIU Minzhi; CHEN Lian; XIAO Yaotian (Institute of Metal Research; Academia Sinica; Shenyang) |
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Cite this article:
by LUO Enzhou; LIU Minzhi; CHEN Lian; XIAO Yaotian (Institute of Metal Research; Academia Sinica; Shenyang). FORMATION OF TENSILE FLAKE IN SUPER STRENGTH STEEL. Acta Metall Sin, 1986, 22(3): 38-42.
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Abstract The process of tensile flake formation in super strength steel 30CrMnSiNi2A under tensile elongation at low strain rate was studied by SEM and IMMA. It is shown that the formation of tensile flake is from the dislocation transportation deduced hydrogen damage but not from the diffusion of hydrogen. The critical deformation, ε_o~c, forming tensile flake of tempered martensite or lower bainite of the steel is about 4.0 or 5.0% respectively under the same hydrogen content 5.0 cm~3/100g and same strain rate 3×10~(-5)/s. The microfeature of tensile flake is a fracture mode of quasi-cleavage with hydrogen tearing trace. A higher hydrogen content on the fracture surface of tensile flake than that of the matrix is indicated by IMMA.
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Received: 18 March 1986
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1 夏纬通;刘民治;陈廉,材料科学进展--纪念李薰逝世三周年,科学出版社,1986年,p.41-50．
2 刘民治;陈廉;尹万全;刘盛炎;苏会和;万耀光;柏森;陈泉浴;刘守箴等,中国金属学会1979-80年优秀论文选集,第四分册,冶金工业出版社,1984,p.21-55．
3 Oriani, R.A.; Josephic, P.H., Acta Metall., 22 (1974) , 1065．
4 Tien, J.K.; Thompson, A.W.; Bernstein, I.M.; Richards, R.J., Metall. Trans., 7 (1976) , 821．
5 徐祖耀,马氏体与马氏体相变,科学出版社,1980年.
6 Gibala, R., Demiglio. D.S., Hydrogen Effects in Metals, Proc. of the 3rd Int. Conf., Wyming, Eds. Bernstein, I.M.; Thompson, I.M., AIME, 1981．
7 Lee, J.Y.; Lee, J.L.; Choo, W.Y., Current Solutions to Hydrogen Problems in Metals, Proc. Conf. Washington D.C., 1982, p. 423． |
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