铸造2024，Vol.73Issue(3)：303-312,10.
基于组织特征的挤压铸造A356合金局部力学性能研究
Study on Local Mechanical Properties of Squeezing Casting A356 Alloy Based on Microstructural Characteristics
摘要
Abstract
The local mechanical properties of A3 56 squeezing castings were studied by finite element analysis(FEA)with microstructure-based models.By analyzing different analysis domain sizes,mesh sizes and FEA models,the FEA models for each position were determined.Subsequently,the accuracy of the calculation results was validated by experimental results.Furthermore,the effect of microstructural characteristics on mechanical properties was explored,indicating that with an increase in Si particle length and shape factor,both the ultimate tensile strength and elongation exhibited a decreasing trend.Conversely,higher Si particle density and area fraction resulted in increasing ultimate tensile strength but decreasing elongation.The damage evolution process of the A356 alloy consisted of three stages:particle cracking(microcrack formation),crack propagation and connection.When the Si particles were small and uniformly distributed,the local mechanical properties exhibited low anisotropy.Conversely,when the Si particles had a larger aspect ratio and exhibited pronounced orientation,increased anisotropy was observed.关键词
A356合金/挤压铸造/组织特征/有限元分析/力学性能Key words
A356 alloy/squeezing casting/microstructural characteristics/finite element analysis(FEA)/mechanical properties分类
矿业与冶金引用本文复制引用
马万里,赵海东,王雪灵,杨鹏,黄智..基于组织特征的挤压铸造A356合金局部力学性能研究[J].铸造,2024,73(3):303-312,10.基金项目
北京市自然科学基金-小米创新联合基金(L223001) （L223001）
广东省重点领域研发计划资助项目(2020B010186002). 感谢山东宏和轻量化科技有限公司为研究提供了实验分析铸件 （2020B010186002）
同时感谢山东宏和轻量化科技有限公司"高服役性高疲劳挤压铸造结构件制备技术"项目的资助支持. （）
