Research on the hot deformation behavior and graphite morphology of spheroidal graphite cast iron at high strain rate

被引：19

作者：

Qi, Kai ^{[1
]}

Yu, Fengyun ^{[1
]}

Bai, Fudong ^{[1
]}

Yan, Zhiming ^{[1
]}

Wang, Zhixin ^{[1
]}

Li, Tingju ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116085, Peoples R China

来源：

MATERIALS & DESIGN | 2009年 / 30卷 / 10期

基金：

中国国家自然科学基金;

关键词：

MECHANICAL-PROPERTIES;

D O I：

10.1016/j.matdes.2009.05.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot deformation behavior of spheroidal graphite cast iron (SGCI) was investigated quantitatively from 600 degrees C to 950 degrees C at high strain rate of 10 s(-1) by compression tests on a Gleeble-1500 simulator. The results show that the peak strain increases gradually with increasing deformation temperatures in the range of 600-800 degrees C and decreases when the temperature is raised to 800 degrees C and above. The optimum deformation temperature range is determined at 700-900 degrees C. The graphite particles become spindles or flakes after deformation, even some graphite collapse in the compressed specimens with about 0.7 peak strains. The graphite area fraction decreases as the temperature increases, at the same time, the high peak strain promotes the dissolving of carbon. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：4511 / 4515

页数：5

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