Microstructural evolution and hierarchical synergy in maraging steels: Tailoring strength and ductility through austenite reversion

被引：0
|
作者：
Masoumi, M. [1 ]
Fonseca, B. [2 ]
Beres, M. [2 ]
Silva-Neto, M. J. [2 ]
Abreu, H. F. G. [2 ]
机构：
[1] Univ Fed Abc, Ctr Engn Modeling & Appl Social Sci, Santo Andre, SP, Brazil
[2] Univ Fed Ceara, Dept Met & Mat Engn, Fortaleza, CE, Brazil
来源：
MATERIALS LETTERS | 2025年 / 391卷
关键词：
Kurdjumov-Sachs OR; Grain disorientation; Taylor factor; DEFORMATION; BEHAVIOR;
D O I：
10.1016/j.matlet.2025.138494
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigates the microstructural evolution and phase transformations in advanced maraging steel, emphasizing the interplay between reverted austenite, martensite, and nanoprecipitates. X-ray diffraction confirmed 9.8 f 0.3 vol% retained austenite, while nanoindentation revealed its stress-assisted transformation, enhancing ductility via the TRIP effect. Aging at 560 degrees C preserved the martensitic laths, promoting microchemical diffusion and austenite reversion. EBSD analysis highlighted Kurdjumov-Sachs orientation relationships and dislocation dynamics, linking lattice distortion to mechanical strength. This hierarchical nanostructural synergy enhances ductility and toughness with minimal reduction in strength by combining hard nanoprecipitates and soft reverted austenite within the martensitic structure.
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页数：5
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