Investigation on Microstructure Evolution of a Semi-Austenitic Stainless Steel Through Hot Deformation

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-09-10 DOI:10.22068/IJMSE.17.3.60

S. Mortezaei, H. Arabi, H. Seyedein, A. Momeny, M. Soltanalinezhad

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引用次数: 4

Abstract

: Dynamic Recrystallization (DRX) is one of the likely mechanisms for fine-graining in metals and alloys. The dynamic recrystallization (DRX) phenomena occur in different thermo-mechanical processing (TMP) conditions for various metallic materials. DRX depends on various materials and thermo-mechanical parameters such as temperature, strain rate, strain, stress, and initial microstructure. in the present study, the restoration mechanism of the 17-7PH stainless steel has been investigated using a hot compression test under different conditions of thermo-mechanical treatment. The microstructural characteristics and the behavior of the hot deformation of the understudy steel are investigated using flow curves and microstructure images obtained from optical microscopy. The results show that the maximum and steady-state stresses are significantly affected by the strain rate and the deformation temperature. So, the flow stress increases with a decrease in the deformation temperature and an increase in the strain rate. Microstructural studies confirm the occurrence of DRX as a restoration mechanism in the microstructure for the two phases of austenite and ferrite.

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半奥氏体不锈钢热变形组织演变的研究

动态再结晶(DRX)是金属和合金中形成细晶的可能机制之一。不同的金属材料在不同的热机械加工条件下会发生动态再结晶现象。DRX取决于各种材料和热机械参数，如温度、应变速率、应变、应力和初始微观结构。通过热压缩试验，研究了17-7PH不锈钢在不同热处理条件下的修复机理。利用流动曲线和光学显微组织图像研究了钢的组织特征和热变形行为。结果表明，应变速率和变形温度对最大应力和稳态应力有显著影响。流变应力随变形温度的降低和应变速率的增大而增大。显微组织研究证实了DRX的存在是奥氏体和铁素体两相组织的一种恢复机制。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.