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论文类型：期刊论文

发表时间：2009-12-01

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI、Scopus

卷号：30

期号：10

页面范围：4511-4515

ISSN号：0261-3069

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.