Quan, G.-Z., Wang, Y., Liu, Y.Y., Zhou, J.
24485306400;56004292200;55936195300;55493538900;
Effect of temperatures and strain rates on the average size of grains refined by dynamic recrystallization for as-extruded 42CrMo steel
(2013) Materials Research, 16 (5), pp. 1092-1105. 被引用 11 次.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890060637&doi=10.1590%2fS1516-14392013005000091&partnerID=40&md5=9928d23f1431c9d100381fa69819c199

DOI: 10.1590/S1516-14392013005000091
归属机构: School of Material Science and Engineering, Chongqing University, Chongqing 400044, China
摘要: In order to study the dynamic recrystallization (DRX) behavior of as-extruded 42CrMo high-strength steel, a series of isothermal upsetting experiments were carried out in a temperature range of 1123~1348 K and a strain rate range of 0.01~10 s-1 on Gleeble 1500. It was found that DRX softening is more recognizable at higher temperatures and lower strain rates, and stress level increases with increasing strain rate and decreasing deformation temperature. The types of flow stress evolution were distinguished by the following three characteristics: WH followed by DRX, WH followed by DRV, and WH followed by no dynamic softening. At a fixed temperature, the average grain size refined by DRX linearly decreases with increasing strain rate in log scale. At a fixed strain rate, the average grain size remains almost constant below 1273 K, while it rapidly increases above 1273 K. At a larger strain rate, data set of grain sizes has a smaller standard deviation to the average size value, and data have tightly grouped. This indicates that as strain rate increases, the microstructure becomes more and more uniform. The relationships between the average grain size and Zener-Hollomon parameter were nonlinearly fitted by the equation DA = 319.81202-13.6114 lnZ + 0.15322 (lnZ)2. The results from this equation show that the average grain size decreases with increasing Zener-Hollomon parameter. On the plot of DA versus lnZ, the regions corresponding to DRV (lnZ 37.8) and DRX (lnZ 37.8) were clarified clearly. © 2013.
作者关键字: Dynamic recrystallization;  Flow stress;  Grain size;  Microstructure
索引关键字: Average grain size; Deformation temperatures; Dynamic recrystallization (DRX); Dynamic softening; Effect of temperature; Grain size; Standard deviation; Zener-Hollomon parameter, Chromium alloys; Crystal microstructure; Dynamic recrystallization; Grain size and shape; Microstructure; Plastic flow; Thermal logging, Strain rate
通讯地址: School of Material Science and Engineering, Chongqing University, Chongqing 400044, China
ISSN: 15161439
原始文献语言: English
来源出版物名称缩写: Mater. Res.
文献类型: Article
访问类型: Open Access
来源出版物: Scopus