THE EFFECT OF NICKEL CONTENT ON THE ENVIRONMENTAL ASSISTED CRACKING (EAC) BEHAVIOR OF LOW-ALLOY STEELS IN SOUR ENVIRONMENTS - A REVIEW

被引：12
作者：
JARVIS, AR
BULLOCH, JH
机构：
[1] University of the Witswatersrand, Department of Metallurgy and Material Engineering, Johannesburg
[2] Electricity Supply Board, Lower Fitzwilliam Street
来源：
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 1992年 / 49卷 / 03期
关键词：
D O I：
10.1016/0308-0161(92)90117-X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This particular review attempts to rationalise the effects of nickel level on the susceptibility to environmental assisted cracking (EAC) of low alloy steels. Historically, nickel has been viewed as a detrimental addition; indeed research studies indicated that the use of more than 1% Ni lowers the low alloy steel's resistance to both sulphide and hydrogen stress cracking. However, in view of nickel's beneficial effects on cryogenic tensile, fatigue, and fracture toughness properties there has been renewed interest in rigorously elucidating nickel's true role in environmentally assited cracking processes. Recent studies tend to show that with the appropriate heat treatment low alloy nickel steels can have equivalent EAC resistance to nickel free steels. Nickel's effect on low alloy steels appears to be in reducing the Ac1 (thus producing untempered martensite when tempered at high temperatures), decreasing the lattice diffusion of hydrogen, enhancing formation of surface trenches, and reducing the overall corrosion rate.
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页码：271 / 307
页数：37
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