Grain Boundary Engineering of Medium Mn TWIP Steels: A Novel Method to Enhance the Mechanical Properties

被引：8
作者：
Kalsar, Rajib [1 ]
Kumar, Lailesh [1 ]
Suwas, Satyam [1 ]
机构：
[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
来源：
ISIJ INTERNATIONAL | 2018年 / 58卷 / 07期
关键词：
thermo-mechanical processing; grain boundary engineering; microstructure; texture; mechanical properties; AUSTENITIC STAINLESS-STEEL; CHARACTER-DISTRIBUTION GBCD; INTERGRANULAR CORROSION; ENERGY-DISTRIBUTIONS; FRACTAL ANALYSIS; NICKEL; TEXTURE; MICROSTRUCTURE; EVOLUTION; COPPER;
D O I：
10.2355/isijinternational.ISIJINT-2017-710
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The grain boundary engineering (GBE) approach was employed on a medium manganese (Mn) based twinning induced plasticity (TWIP) steel to improve its mechanical properties. Two specially designed thermo-mechanical processing (TMP) routes, one involving unidirectional rolling (UDR) and the other one employing multi-step cross rolling (MSCR), with intermediate short term annealing treatment have been used. The annealing temperatures are chosen considering recrystallization and grain growth. Of the two routes, the one involving MSCR, has shown a higher fraction of special or coincident lattice site (CSL) grain boundaries. A detailed grain boundary microstructural analysis has been carried out by electron backscatter diffraction (EBSD) for differently processed samples. A significant improvement in ductility is observed in MSCR processed samples due to increase of CSL boundary fraction.
引用
收藏
页码：1324 / 1331
页数：8
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