Interaction between recrystallization and strain-induced precipitation in a high Nb- and N-bearing austenitic stainless steel: Influence of the interpass time

被引：28
作者：
Silva, M. B. R. [1 ]
Gallego, J. [2 ]
Cabrera, J. M. [3 ,4 ]
Balancin, O. [1 ]
Jorge, A. M., Jr. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
[2] UNESP, Dept Mech Engn, BR-15385000 Ilha Solteira, SP, Brazil
[3] Univ Politecn Cataluna, Dept Mat Sci & Met Engn, E-08028 Barcelona, Spain
[4] Fundacio CTM Ctr Tecnol, Manresa 08243, Spain
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 637卷
基金：
巴西圣保罗研究基金会;
关键词：
Hot mechanical behavior; Recrystallization; Grain refinement; Niobium; Precipitation; Stainless steel; NIOBIUM MICROALLOYED STEEL; DYNAMIC RECRYSTALLIZATION; HIGH-NITROGEN; DEFORMATION CONDITIONS; HOT; TEMPERATURE; BIOMATERIAL; COLD;
D O I：
10.1016/j.msea.2015.04.049
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, we studied the influence of the interpass time (20 and 5 s) on the interaction between recrystallization and strain-induced precipitation occurring during multiple passes' deformations under continuous cooling conditions in a high niobium- and nitrogen-bearing austenitic stainless steel (ISO 5832-9). The correlation between microstructure evolution and hot mechanical properties was performed by physical simulation using hot torsion tests. The microstructure evolution was analyzed by optical microscopy, transmission electron microscopy and electron back scattered diffraction (EBSD). This technique indicated that dynamic recrystallization occurred at the first passes promoting an excellent grain refinement. On the other hand, shorter interpass time (5 s) allowed higher volume fraction of smallest precipitates than larger interpass time (20 s). After soaking, only TiNbN precipitates were found, whereas, Z-phase (CrNbN) and NbN were formed during thermomechanical processing. Particles with sizes between 20 and 50 nm were effective to pin grain boundaries and dislocations. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：189 / 200
页数：12
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