超细晶粒铁素体-马氏体钢中疲劳极限的提高

Enhanced Fatigue Limit in Ultrafine-Grained Ferritic-Martensitic Steel.

作者信息

Nikitina Marina A, Islamgaliev Rinat K, Ganeev Artur V, Frik Aleksandra A

机构信息

Institute of Physics of Advanced Materials, Ufa University of Science and Technology, 32 Zaki Validi Str., 450076 Ufa, Russia.

Laboratory of Multifunctional Materials, Ufa University of Science and Technology, 32 Zaki Validi Str., 450076 Ufa, Russia.

出版信息

Materials (Basel). 2023 Feb 15;16(4):1632. doi: 10.3390/ma16041632.

DOI:10.3390/ma16041632

PMID:36837261

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9960829/

Abstract

The influence of the ultrafine-grained (UFG) structure on the fatigue endurance limit and the nature of fatigue failure have been studied. It is shown that the formation of the UFG structure containing carbides and the coincidence site lattice relationship (CSL) and twin boundaries leads to an increase in the fatigue endurance limit. To study the mechanisms of fatigue failure, scanning and transmission electron microscopy and X-ray diffraction analysis were used. Studies have shown that the formation of the UFG structure as a result of rolling and subsequent heat treatment above the temperature of the ferrite/austenite phase transition leads to an increase in the fatigue endurance limit by more than 70%, from 475 to 800 MPa, compared to coarse-grained samples. The dynamic aging observed during fatigue tests was more pronounced in materials with a UFG microstructure. The influence of the CSL and twin boundaries on the nature of the fatigue failure of ferritic-martensitic steel is discussed.

摘要

研究了超细晶粒（UFG）结构对疲劳极限和疲劳失效性质的影响。结果表明，含有碳化物的超细晶粒结构的形成以及重合位置点阵关系（CSL）和孪晶界导致疲劳极限增加。为了研究疲劳失效机制，使用了扫描电子显微镜、透射电子显微镜和X射线衍射分析。研究表明，与粗晶粒样品相比，通过轧制以及随后在铁素体/奥氏体相变温度以上进行热处理形成的超细晶粒结构，使疲劳极限提高了70%以上，从475MPa提高到800MPa。在疲劳试验中观察到的动态时效在具有超细晶粒微观结构的材料中更为明显。讨论了CSL和孪晶界对铁素体-马氏体钢疲劳失效性质的影响。