Nanoprecipitation-suppressed ferrite transformation (γ → α) during tempering in a medium-manganese steel

被引：14
|
作者：
Xu, Yuantao [1 ,2 ]
Li, Wei [1 ,2 ]
Zuo, Xunwei [2 ]
Li, Yu [1 ,2 ]
Zhang, Caiyi [3 ]
Min, Na [4 ]
Chen, Hao [5 ]
Jin, Xuejun [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[3] Baoshan Iron & Steel Co Ltd, R&D Ctr, Heavy Steel Plate Inst, 889 Fujin Rd, Shanghai 201900, Peoples R China
[4] Shanghai Univ, Key Lab Microstruct, Shanghai 200444, Peoples R China
[5] Tsinghua Univ, Key Lab Adv Mat, Minist Educ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Partitioning and tempering; Pinning effect; Interface migration; NiAl-type precipitates; AUSTENITE; STRENGTH; BOUNDARIES; BEHAVIOR; GROWTH; MARTENSITE; NUCLEATION; INTERFACES; DRAG;
D O I：
10.1016/j.scriptamat.2018.11.050
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
NiAl-type nanoparticles retained on phase interfaces in the first step of partitioning treatment, e.g. 610 and 630 degrees C/1 h (P-610 and P-630), could effectively hinder interface migration from austenite to ferrite during the subsequent tempering treatment (500 degrees C/2 h) due to pinning effect. The deduced pinning pressure from the dilatation results is consistent with that from the pinning theory calculation. When the nanoparticles were absent in the specimen treated at 650 degrees C/1 h (P-650), the significant interface migration persisted before precipitation of NiAl-type nano-particles (500 degrees C/1800s) and gradually disappeared after they precipitated (500 degrees C/3600 s), which confirmed that nanoprecipitation does suppress ferrite transformation by the pinning effect. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：391 / 396
页数：6
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