The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels
Although the ageing process is the most important metallurgical process influencing the austenite reversion reaction, the role of retained austenite existing after cryogenic treatment on austenite reversion transformation is still not fully explored. Therefore, via different cooling modes, i.e. wate...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| author | Chih-Yuan Chen Iting Chiang Yung-Chang Kang |
| author_facet | Chih-Yuan Chen Iting Chiang Yung-Chang Kang |
| author_sort | Chih-Yuan Chen |
| collection | DOAJ |
| description | Although the ageing process is the most important metallurgical process influencing the austenite reversion reaction, the role of retained austenite existing after cryogenic treatment on austenite reversion transformation is still not fully explored. Therefore, via different cooling modes, i.e. water quenching (WQ), air cooling (AC), and furnace cooling (FC), applied after austenitization treatment, different amounts of retained austenite, namely 0.3 % (WQ), 0.5 % (AC), and 1.2 % (FC), were formed in the martensite matrix of Ti–Mo precipitation hardening stainless steels (PHSSs). Interestingly, even under the same ageing treatment condition, i.e. 520 °C for 4 h, the amount of reverted austenite that formed in Ti–Mo PHSSs strongly depended on the cooling rate used. For instance, according to EBSD phase maps, the reverted austenite contents were 24.7 %, 15.0 %, and 9.4 % in the steel specimens cooled by FC, AC and WQ, respectively. Therefore, a positive correlation was found between retained austenite and reverted austenite after comparison of the overall EBSD analysis results. In addition, it was found that the strength and ductility trade-off relationship was improved in steel samples subjected to the slow cooling treatment, as numerous η-Ni3Ti precipitates and larger amounts of reverted austenite formed simultaneously during the ageing treatment. |
| format | Article |
| id | doaj-art-bf44a9ebae1f429f943441d7ada6c25a |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-bf44a9ebae1f429f943441d7ada6c25a2025-01-23T05:26:51ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013514761493The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steelsChih-Yuan Chen0Iting Chiang1Yung-Chang Kang2Graduate Institute of Intellectual Property, National Taipei University of Technology, Taipei, 10608, Taiwan; Corresponding author.Graduate Institute of Intellectual Property, National Taipei University of Technology, Taipei, 10608, TaiwanGloria Material Technology Corporation, Tainan, 736403, TaiwanAlthough the ageing process is the most important metallurgical process influencing the austenite reversion reaction, the role of retained austenite existing after cryogenic treatment on austenite reversion transformation is still not fully explored. Therefore, via different cooling modes, i.e. water quenching (WQ), air cooling (AC), and furnace cooling (FC), applied after austenitization treatment, different amounts of retained austenite, namely 0.3 % (WQ), 0.5 % (AC), and 1.2 % (FC), were formed in the martensite matrix of Ti–Mo precipitation hardening stainless steels (PHSSs). Interestingly, even under the same ageing treatment condition, i.e. 520 °C for 4 h, the amount of reverted austenite that formed in Ti–Mo PHSSs strongly depended on the cooling rate used. For instance, according to EBSD phase maps, the reverted austenite contents were 24.7 %, 15.0 %, and 9.4 % in the steel specimens cooled by FC, AC and WQ, respectively. Therefore, a positive correlation was found between retained austenite and reverted austenite after comparison of the overall EBSD analysis results. In addition, it was found that the strength and ductility trade-off relationship was improved in steel samples subjected to the slow cooling treatment, as numerous η-Ni3Ti precipitates and larger amounts of reverted austenite formed simultaneously during the ageing treatment.http://www.sciencedirect.com/science/article/pii/S2238785425001322Precipitation hardening stainless steelCooling rateNi3TiRetained austeniteReverted austeniteEBSD |
| spellingShingle | Chih-Yuan Chen Iting Chiang Yung-Chang Kang The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels Journal of Materials Research and Technology Precipitation hardening stainless steel Cooling rate Ni3Ti Retained austenite Reverted austenite EBSD |
| title | The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels |
| title_full | The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels |
| title_fullStr | The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels |
| title_full_unstemmed | The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels |
| title_short | The effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of Ti–Mo precipitation hardening stainless steels |
| title_sort | effect of retained austenite on austenite reversion behavior and corresponding mechanical properties of ti mo precipitation hardening stainless steels |
| topic | Precipitation hardening stainless steel Cooling rate Ni3Ti Retained austenite Reverted austenite EBSD |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001322 |
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