https://scholars.lib.ntu.edu.tw/handle/123456789/631323
標題: | Distinguishing Features of Quenched Nanoprecipitates in Allotriomorphic Ferrite and Reverted γ during Aging for Dual-Phase PHSS | 作者: | Yu, Ping Jui Tsao, Tzu Ching Hsu, Cheng An Gan, Neng Hao Wang, Shing Hoa JER-REN YANG Chang, Horng Yi Chung, Tsai Fu |
關鍵字: | allotriomorphic δ ferrite (ALF) | Cu-rich nanoprecipitates | dual phases | precipitation-hardened stainless steel | 公開日期: | 1-三月-2023 | 出版社: | MDPI | 卷: | 13 | 期: | 3 | 來源出版物: | Metals | 摘要: | A novel dual-phase PHSS consisting of lath martensite plus allotriomorphic δ ferrite (ALF) with nanoprecipitates was characterized by high-resolution field emission transmission electron microscopy for quenched, solid-solution-treated, and aged stainless steel. The effects of aging at various durations prior to H2O or liquid N2 quenching were investigated. Cu-rich nanoprecipitates evolve from body-centered cubic clusters to 9R Cu under quenching to 3R Cu and subsequently to face-centered cubic ε-Cu at various aging durations. Maximum hardness was observed after aging at 600 °C for 1 h. However, after this aging, both reversed austenite and Cu-rich nanoprecipitates coexisted in the martensite matrix. The segregation and diffusion of austenite-stabilizing elements promoted the nucleation of reversed austenite. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/631323 | ISSN: | 2075-4701 | DOI: | 10.3390/met13030625 |
顯示於: | 材料科學與工程學系 |
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