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| A STUDY ON THE STRESS CORROSION CRACKING PROCESS OF TWO AUSTENITIC STAINLESS STEELS IN BOILING 42%MGCl_2 SOLUTION |
| Wang Zhenyqiao Wu Youlin Ji Xiaochun (The Central Institute of Iron and Steel Research; The Ministry of Metallurgical Industry) |
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Abstract The stress corrosion cracking(SCC)process of 18-8Ti and 17-12Mo stainless steel in boiling 42％ MgCl_2 solution was studied by using constant load tests. The endurance creep behavior of these steels was examined. Simulated galvanic cell tests and stress corrosion tests using pre-creeping specimens were conducted. The results suggested that SCC of austenitic stainless steels in boiling 42％ MgCl_2 solution results from synergism and competition between deformation-enhanced activation and repassivation of surface films. It is rather difficult to divide the cracking process into essentially different periods, The induction periods obtained with various parameters tend to be inconsistant At the early stage of crack propagation period(tp), it is the number of cracks that increases mainly, after which cracks propagate along the length and depth. The tp-σ(applied stress)relation seems to follow an exponential law. The SCC of both steels is transgranular(TC)-intergranular(IC); TC is predominantly observed in 18-8Ti steel, while IC prevails in 17-12Mo steel.
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Received: 25 June 1984
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Cite this article:
Wang Zhenyqiao Wu Youlin Ji Xiaochun (The Central Institute of Iron and Steel Research; The Ministry of Metallurgical Industry). A STUDY ON THE STRESS CORROSION CRACKING PROCESS OF TWO AUSTENITIC STAINLESS STEELS IN BOILING 42%MGCl_2 SOLUTION. J Chin Soc Corr Pro, 1984, 4(3): 187-198.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1984/V4/I3/187
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