Formation mechanism and application potential of Σ1 boundary in grain boundary engineering of high nitrogen austenitic stainless steel

被引：5
|
作者：
Wang, Zhenhua [1 ,2 ,3 ]
Liu, Yi [3 ]
机构：
[1] Yanshan Univ, Sch Mech Engn, Qinhuangdao 066004, Hebei, Peoples R China
[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China
[3] HBIS Grp Technol Res Inst, Shijiazhuang 050023, Hebei, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 253卷
关键词：
Metals and alloys; Microstructure; Grain boundaries; INTERGRANULAR CORROSION-RESISTANCE; CHARACTER-DISTRIBUTION; NICKEL-FREE; MICROSTRUCTURE; DEFORMATION; EVOLUTION; NETWORK; SIZE;
D O I：
10.1016/j.matlet.2019.07.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sigma 3 boundaries improve the intergranular corrosion resistance of high nitrogen austenitic stainless steels. However, the regeneration of these boundaries is, unfortunately, accompanied by significant grain coarsening. 18Mn18Cr0.5N and 18Mn18Cr0.6N steels were thermo-mechanically processed and the corresponding microstructures were evaluated. Formation mechanisms were proposed for Sigma 1 boundaries in different R-Sigma 3-Sigma 1 -type junctions. These boundaries formed during grain growth accompanying Sigma 3 formation and reaction. After 30% cold tension and cyclic heating between 500 degrees C and 1100 degrees C, numerous Sigma 1 boundaries were formed and disrupted the high angle grain boundary network efficiently. Moreover, a small grain size was maintained. Sigma 1 boundaries have significant application potential in grain boundary engineering. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：377 / 380
页数：4
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