Microstructural and electrochemical characterization of a thin-section dissimilar stainless steel weld joint
Microstructural and electrochemical characterization of a thin-section dissimilar stainless steel weld joint
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DOI：
10.1016/j.matchemphys.2008.11.044
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发表时间：
2009-05
影响因子：
4.6
通讯作者：
P. B. Srinivasan;M. S. Kumar
中科院分区：
文献类型：
--
作者：
P. B. Srinivasan;M. S. Kumar
采用钨极氩弧焊技术，在优化的焊接工艺条件下，获得了奥氏体不锈钢（ASS）和马氏体不锈钢（MSS）异种钢的焊接接头。焊缝金属被发现是双相的，并且由含有约3- 8 EFN的枝晶间铁素体的奥氏体基体构成，具有过匹配的机械性能。电化学行为评估的复合区包括焊缝金属，热影响区的ASS和MSS表现出不同的一般腐蚀行为在中性和酸性氯化物溶液。然而，在两种电解质中，该区域的点蚀敏感性最高，并且观察到该复合区的MSSHAZ更容易受到局部损伤。
A dissimilar weld joint consisting of an austenitic stainless steel (ASS) and a martensitic stainless steel (MSS) was obtained under optimized welding conditions by autogenous gas tungsten arc welding technique. The weld metal was found to be dual-phased, and was constituted with an austenite matrix containing interdendritic ferrite of about 3–8EFN, with over-matching mechanical properties. Electrochemical behaviour assessment of the composite zone comprising the weld metal, HAZ of both ASS and MSS showed different general corrosion behaviour in neutral and acidic chloride solutions. However, in both the electrolytes, the pitting susceptibility of this region was the highest, and the MSSHAZ of this composite zone was the observed to be more vulnerable to localized damage.