袁战伟,李付国,王春伟,王瑜,郭亚杰,周亮.基于Murty准则的SiCp/Al复合材料热加工图研究[J].材料导报,2018,32(4):657-661 |
基于Murty准则的SiCp/Al复合材料热加工图研究 |
Study on Hot Processing Map of SiCp/Al Composite Based on Murty Criterion |
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DOI:10.11896/j.issn.1005-023X.2018.04.030 |
中文关键词: SiCp/Al复合材料 热加工图 Murty准则 |
英文关键词: SiCp/Al composite, hot processing map, Murty criterion |
基金项目:基金项目:西北工业大学凝固技术国家重点实验室开放课题(SKLSP201646;SKLSP201645);中央高校基本科研业务费专项资金(2014G1311090;310831161023;310831163401) |
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中文摘要: |
采用热模拟压缩试验对15%(体积分数)SiCp/Al复合材料在温度为623~773 K、应变速率为0.001~10 s-1的热变形行为进行了研究,基于Murty准则建立了该材料的热加工图,并在此基础上建立了SiCp/Al复合材料临界失稳应变分布图。结果表明,随变形温度升高,SiCp/Al复合材料中的强化机制逐渐减弱,软化机制逐渐增强。基于临界失稳应变图可以确定出适合SiCp/Al复合材料加工的两个区域,分别为变形温度700~773 K、应变速率0.001~0.01 s-1和变形温度740~773 K、应变速率0.02~0.14 s-1。 |
英文摘要: |
The hot deformation behavior of 15vol% SiCp/Al composite has been studied with thermal simulation compression test in the temperature range of 623—773 K and strain rate range of 0.001—10 s-1. Based on Murty criterion, the hot processing maps have been established, and a critical instability strain map has been drawn accordingly. It can be found that with the increased deformation temperature, the strengthening mechanism of SiCp/Al composite decreased and softening mechanism enhanced gradually. Based on the critical instability strain map, two suitable regions for SiCp/Al composite materials hot processing have been identified, namely in deformation temperature range of 700—773 K, strain rate range of 0.001—0.01 s-1, and deformation temperature range of 740—773 K and strain rate range of 0.02—0.14 s-1. |
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