Mechanical properties in as–cast and heat treated Al–Si–Cu alloys
Mechanical properties in as–cast and heat treated Al–Si–Cu alloys
复制标题
铸态和热处理 Al-Si-Cu 合金的机械性能
DOI：
10.1504/ijmmp.2012.048518
复制
发表时间：
2012
影响因子：
--
通讯作者：
S. Valtierra
中科院分区：
文献类型：
--
作者：
A. Canales;E. Carrera;J. Talamantes;S. Valtierra
采用强热梯度凝固获得多种显微组织的铸锭切割样品，研究了一系列铝合金的力学性能。样品的硅含量为5% ~ 11%，铁含量为0.3% ~ 0.8%，铜、锰、镁含量分别为3.1% ~ 3.5%、0.40% ~ 0.45%、0.27%和0.32%。将不同组织的试样加工成拉伸试样，分别在铸态和稳定化热处理条件下进行拉伸试验。分析表明，微观组织细化和硅添加量对合金的力学性能都有影响，但前者的影响较大。热处理提高了材料的屈服强度和拉伸强度，但降低了材料的延展性。铁的添加量对合金的力学性能无显著影响。
The mechanical properties of a series of experimental aluminium castings alloys were studied in samples cut from ingots that solidified with a strong thermal gradient to obtain a wide range of microstructures. The samples were cast with a content of silicon that varied from 5% to 11% and iron from 0.3% to 0.8%, copper, manganese and magnesium were kept within the ranges of 3.1% to 3.5%, 0.40% to 0.45% and 0.27% and 0.32% respectively. Samples with different microstructures were machined into tensile specimens that were tested in the as–cast and stabilisation heat treatment conditions. The analyses show that the mechanical properties are affected by microstructural refining and to the amount of silicon added, although the former exerts a higher influence. It was also found that heat treating enhances the yield and tensile strength, but reduces the ductility of the material. No significant effect between the mechanical properties and the amount of iron was found.