AZ61复合材料半固态触变成形的数值模拟.pdfVIP

学兔兔 铸 造 Jan．2010 · 34 · FOUNDRY VOI．59 N0．1 SiCp／AZ61复合材料半固态触变成形的数值模拟 张发云 ，闫 洪 (1．新余高等专科学校太阳能科学与工程系，江西新余338031； 2．南昌大学先进成形制造及模具研究所，江西南昌330029) 摘要：采用等温热处理法制备sic ／Az61复合材料半固态坯料。运用所建立的高固相sic ／AZ6l复合材料本构模型，对 其触变成形过程进行数值模拟，得到成形过程_中的应力和应变分布，并对比了触变成形和常规成形的成形特点。结果 表明，SiC ／AZ61复合材料触变成形具有变形抗力小、应力分布均匀的特点。通过对比试验结果和模拟结果可知，两者 吻合较好，所获结果可指导镁基复合材料触变成形工艺实践。 关键词：SiC ／AZ61复合材料；半固态；触变成形；数值模拟 中图分类号：TG331 文献标识码：A 文章编号：1001—4977(2010)01—0034—04 Numerical Simulation of Thixoforming of SiCWAZ61 Composites in Sem i．Sol id State ZHANG Fa-yun’，YAN Hong (1．Department of Solar Energy Science and Engineering，Xinyu College，Xinyu 338031， Jiangxi，China；2．1nstitute of Advanced FOrmingManufacturing and Die＆Mold， Nanchang University，Nanchang 330029，Jiangxi，China) Abstract：Semi-solid specimen of SiC 61 composites was fabricated by semi．solid isothermaI heat treatment．The thixoforming process of SiC：WAZ61 composites was studied by numericaI simulation using the constitutive modeI of SiC Z61 composites with solid volume fraction，which was established in our prior Iiterature．The distribution of stress and strain has been Obtained in deforming process，and the differences between conventionaI deforming and thixoforming were analyzed．The results indicated that thixoforming 0f SiC 61 composites had some advantages of small deformation resistance and well—proportioned stress．Numerical simulation results were accordIed with experimental ones．which provided theo~ ba