Effect of austenitizing temperature on martensitic transformation in SA508Gr.4N steel

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外文摘要：SA508Gr.4 N steel is commonly used in nuclear pressure vessels.The current study discloses the impact of austenitizing temperature on its martensitic transformation.Various austenitizing temperatures were employed to examine the martensitic transformation at different experimental conditions.The character-istics of grain boundaries,microstructure,transformation kinetics,and crystallography of the martensitic phase following the austenitizing process and martensitic transformation were analyzed.Austenitizing temperatures had minimal effects on the critical temperature of the austenitizing phase transition.How-ever,an increase in austenitizing temperature resulted in larger grain sizes.The phase composition pri-marily consisted of lath martensite,accompanied by a small amount of residual austenite(RA).As the austenitizing temperature increased,the temperature of martensite-start temperature(Ms)initially de-creased and then increased.On the other hand,the temperature of martensite-finish(Mf)showed no significant sensitivity to changes in the austenitizing temperature.Moreover,the average size of the lath martensite structure was increased,and there was an increased tendency for variant selection as the austenitizing temperature increased,and the combination of specific orientation relationships appeared.This study is very valuable for revealing the microstructure evolution at different temperatures.

外文关键词：

SA508Gr.4 N steelAustenitizing temperatureMartensitic transformationMicrostructures characteristics

作者：

Shumeng Lu、Li Wan、Shanju Zheng、Mengnie Li、Juanna Ren、Baosheng Liu、Manal F.Abou Taleb、Zeinhom M.El-Bahy、Zhongdong Xu、Xiaojing Wang、Mohamed M.Ibrahim、Zhanhu Guo

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作者单位：

Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China

Department of Materials Science and Engineering,Inner Mongolia Zhongsheng Engineering Technology Co.,Ltd.,Alashan 750300,China

College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China

Department of Mechanical and Construction Engineering,Faculty of Engineering and Environment,Northumbria University,Newcastle Upon Tyne,NE18ST,UK

Department of Chemistry,College of Science and Humanities in Al-Kharj,Prince Sattam Bin Abdulaziz University,Al-Kharj,11942,Saudi Arabia

Department of Chemistry,Faculty of Science,Al-Azhar University,Nasr City 11884,Cairo,Egypt

Department of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

Department of Chemistry,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia

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基金：

Yunnan Fundamental Research ProjectsYunnan Ten Thousand Talents Plan Young & Elite Talents ProjectKey Research & Development Program of Yunnan ProvinceKey Research & Development Program of Yunnan ProvinceNatural Science Research Foundation of Kunming University of Science and TechnologyPrince Sattam bin Abdulaziz University project

项目编号：

202101AU070152YNWR-QNBJ-2020-020202103AA080017CBN21281004AKKZ3202051043PSAU/2023/R/1444

出版年：

2024

DOI：

10.1016/j.jmst.2023.11.012

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.186(19)

参考文献量83