Arrest of weld-decay in 304 austenitic stainless steel by twin-induced grain boundary engineering
Arrest of weld-decay in 304 austenitic stainless steel by twin-induced grain boundary engineering
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DOI：
10.1016/j.actamat.2007.06.005
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发表时间：
2007-09
期刊：
影响因子：
9.4
通讯作者：
H. Kokawa;M. Shimada;M. Michiuchi;Zhenjin Wang;Y. Sato
中科院分区：
文献类型：
--
作者：
H. Kokawa;M. Shimada;M. Michiuchi;Zhenjin Wang;Y. Sato
对一种孪生晶界工程 304 奥氏体不锈钢进行电弧焊接，该不锈钢具有通过一步热机械工艺产生的高频重合点晶界。通过定向成像显微镜和腐蚀测试检查热影响区。结果表明，由于晶界工程不锈钢在电弧焊接过程中重合位点晶界频率高，且最佳晶界特征分布稳定，因此热影响区敏化引起的晶间腐蚀得到了很好的抑制。晶界工程可以有效抑制奥氏体不锈钢的焊接腐烂。
A twin-induced grain boundary engineered 304 austenitic stainless steel with a high frequency of coincidence site lattice boundaries produced by a one-step thermomechanical process was arc-welded. The heat-affected zone was examined by orientation imaging microscopy and corrosion tests. The results indicated that the intergranular corrosion due to sensitization in the heat-affected zone were perfectly suppressed, because the high frequency of coincidence site lattice boundaries and the optimum grain boundary character distribution were stable in the grain boundary engineered stainless steel during arc-welding. The grain boundary engineering can arrest the weld-decay of austenitic stainless steel effectively.