Unraveling the Effects of Austenitizing Temperature and Austenite Grain Size on the Crystallographic Characteristics and Mechanical Properties of Martensitic Transformation Products in a Low-Alloy Steel

被引：4
作者：
Wu, Binbin [1 ]
Hu, Fangzhong [2 ]
Wang, Zhiquan [3 ]
Yang, Shaopeng [2 ]
Zhong, Rui [3 ]
Shang, Chengjia [3 ,4 ]
Yang, Zhigang [1 ]
Zhang, Chi [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China
[2] Masteel Co Ltd, Tech Ctr, Maanshan 243000, Peoples R China
[3] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China
[4] Yangjiang Adv Alloys Lab, Guangdong Lab Mat Sci & Technol, Yangjiang Branch, Yangjiang 529500, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2023年 / 36卷 / 04期
关键词：
Steel; Martensite; Transformation; Nucleation; Variant; LATH MARTENSITE; PLAIN CARBON; STRENGTH; NUCLEATION; MORPHOLOGY; TOUGHNESS; INSIGHTS; BAINITE; BLOCK; MODEL;
D O I：
10.1007/s40195-022-01501-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of austenitizing temperature and austenite grain size on the crystallographic characteristics and mechanical properties of transformation products was investigated in a low-alloy steel. Annealing at a lower temperature after austenitization at 1050 degrees C can reduce the vacancy concentration and enhance the stability of austenite, thereby determining the martensite-start (M-s) temperature and density of twin-related V1/V2 variant pairs. V1/V2 variant pairs are predominately generated by autocatalytic nucleation, which can promote transformation by self-accommodation. Annealing at 800 degrees C after austenitization at 1050 degrees C generated the highest content of V1/V2 variant pairs, which contributed to high values of strength, Charpy impact energy, and elongation. In addition to refining the austenite grain size, niobium (Nb) microalloying increases the packet boundaries of the transformation products, mainly because the refined austenite grains provide more nucleation sites for the martensitic transformation. However, the density of block boundaries decreases after austenite refinement by Nb microalloying, owing to insufficient autocatalytic nucleation.
引用
收藏
页码：694 / 704
页数：11
相关论文
共 36 条
[31]   The effect of low temperature transformation time on microstructural & textural evolution, mechanical properties and fracture behavior of a low alloy, medium carbon, super strength AISI 4340 steel [J].
Bakhshi, Soroush ;
Mirak, Alireza .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2022, 831
[32]   Effects of shot peening pre-treatment and plasma nitriding parameters on, the structural, mechanical and tribological properties of AISI 4140 low-alloy steel [J].
Kovaci, H. ;
Hamsalihoglu, I. ;
Yetim, A. F. ;
Celik, A. .
SURFACE & COATINGS TECHNOLOGY, 2019, 358 :256-265
[33]   Effects of tempering temperature on microstructural evolution and mechanical properties of high-strength low-alloy D6AC plasma arc welds [J].
Lin, Chun-Ming ;
Lu, Chi-Hao .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 676 :28-37
[34]   Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature [J].
Ma, Hongchi ;
Zhao, Baijie ;
Fan, Yi ;
Xiao, Kui ;
Zhao, Jinbin ;
Cheng, Xuequn ;
Li, Xiaogang .
ACTA METALLURGICA SINICA-ENGLISH LETTERS, 2021, 34 (04) :565-578
[35]   Effects of aging temperature on the microstructure and mechanical properties of 1.8Cu-7.3Ni-15.9Cr-1.2Mo-low C, N martensitic precipitation hardening stainless steel [J].
H. Nakagawa ;
T. Miyazaki ;
H. Yokota .
Journal of Materials Science, 2000, 35 :2245-2253
[36]   Effect of temperature on microstructures and mechanical properties of medium-carbon low-alloy steel by caliber rollingEinfluss der Temperatur auf das Gefuge und die mechanischen Eigenschaften von niedrig legiertem Stahl beim Profilwalzen [J].
Yang, B. ;
Liu, B. X. ;
Zhang, B. Y. ;
Dong, M. C. ;
Chen, C. X. ;
Ji, P. G. ;
Li, Z. Y. ;
Yin, F. X. .
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK, 2022, 53 (09) :1106-1120
1234