|
|
|
Abstract The effect of carbon content and various amount of titanium additions, as well as heat treatment conditions, on stress corrosion cracking(SCC) susceptibility of Cr18Mo2 ferritic stainless steel in 143℃ boiling MgCl_2 solution was investigated by slow strain-rate technique. Results indicate that with the lowering of carbon content, both intergranular and pitting corrosion rates are reduced and, correspondingly, the SCC susceptibility decreases. The amount of appropriate titanium additions that gives Ti/(C+N)ratios ranging from 9.1 to 13.0 has the most inhibitory effect on SCC,Excessive addition of titanium will cause precipitation of cr phase near the grain boundaries, resulting in higher susceptibility to SCC. The intergranular corrosion rate of Crl8Mo2 steel considerably increases if the steel is heat-treated at 1100℃. Under such a condition, SCC becomes very pronounced and the fracture is decidedly intergranular. In contrast, the intergranular corrosion remarkably decreases and the pitting corrosion becomes the predominant factor responsible for the susceptibility to SCC if the heat treatment of the steel is performed at 850℃. In the latter case, transgranular cracking is observed and SCC susceptibility of the steel greatly decreases. Experimental results obtained for the effect of strain rate show that the strain rate of 9×10~(-7s~(-1) gives rise to the most susceptible cracking. The parameters including fracture time t, elongation e; and reduction in area RA can be used to properly evaluate the SCC susceptibility of this ferritic stainless steel,
|
|
Received: 25 April 1990
|
Cite this article:
Yuan Baoiin Xu Lihua Dai Ruhua and Chen Aihua (Shanghai Iron & Steel Research). AN INVESTIGATION OF STRESS CORROSION CRACKING SUSCEPTIBILITY OF TYPE Crl8Mo2 FERRITIC STAINLESS STEEL USING SLOW STRAIN RATE TESTING. J Chin Soc Corr Pro, 1990, 10(2): 119-126.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1990/V10/I2/119
|
[1] Streicher, M.A., Corrosion, 30 (3) , 77(1974)
[2] Bednar, L., Corrosion, 35 (3) , 95 (1979)
[3] Cihal, V., Stainless Steel'77, Climax Mo.Co.,227 (1978)
[4] Bond, A.P.and Dundas, H.J., Corrosion, 24(10) , 344 (1968)
[5] Mohr, T.W.; Troiano, A.R.and Hebemann, R.F., Corrosion, 37 (4) , 199 (1981)
[6] 安保秀雄;细井祐三,防食技术,28(11) ,584(1979)
[7] 阿部征三郎,第33回腐食防食资料,21(1980)
[8] Rarey, C.R.and Aronson, A.H., Corrosion, 28 (7) , 255 (1972)
[9] Tomashov, N.D.; Chernova, G.P.and Marcova, O.N., Corrosion, 20, 166(1954)
[10] Steigerwald, R.F.; Dundas, H.J.; Redmond, J.D.and Davison, R.M., Stainless Steel'77, Climax Mo.Co., 57(1978) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
