Eliminate the contradiction between temperature and toughness by grain-boundary delamination in heterogeneous ultrafine-grained lamellar steels

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2024-12-01 DOI:10.1080/21663831.2024.2399880

Bo Yang, Fuxing Yin, Baoxi Liu, Liying Sun, Tianlong Liu, Hui Yu, Andrey Belyakov, Zhichao Luo

引用次数: 0

Abstract

Heterostructured ferritic steels with bimodal-grained lamellar (BG-L) and ultrafine-grained lamellar (UFG-L) microstructure were prepared through a warm deformation process. The BG-L steel exhibits enhanced mechanical properties compared to conventional quenched and tempered (QT) steel. While the UFG-L steel demonstrates an outstanding combination of strength, ductility, and toughness. Furthermore, the UFG-L steels exhibit no ductile-to-brittle transition (DBT) from room temperature (RT) to liquid nitrogen temperature (LNT) and the Charpy impact energy remains as high as 314 J at LNT. The enhanced toughness at LNT can be attributed to the crack-arrester mechanism caused by grain-boundary delamination.

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在异质超细晶粒层状钢中通过晶界分层消除温度与韧性之间的矛盾

通过温变形工艺制备了具有双峰晶粒层状（BG-L）和超细晶粒层状（UFG-L）微观结构的异种结构铁素体钢。与传统的淬火回火（QT）钢相比，BG-L 钢的机械性能有所提高。而 UFG-L 钢则在强度、延展性和韧性方面都有出色的表现。此外，从室温（RT）到液氮温度（LNT），UFG-L 钢没有出现韧性到脆性的转变（DBT），在 LNT 温度下的夏比冲击能仍然高达 314 J。液氮温度下韧性的增强可归因于晶界分层引起的裂纹-断裂机制。

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.