Transactions of Materials and Heat Treatment

Title：Influence of rolling and T6 treatment on tensile mechanical properties for SiCp / 6061Al composites

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ClassificationCode：TB331

year,vol(issue):pagenumber：2023,48(1):165-170

Abstract：

The as-cast SiCp /6061Al composites was subjected to two post-treatment processes of hot rolling and hot rolling+T6 treatment, respectively. Then, the influences of hot rolling and T6 treatment on the microstructure and tensile strength of the composites were studied by scanning electron microscope, X-ray diffractometer and tensile test equipment. The results show that hot rolling can effectively refine the reinforced particles in the as-cast SiCp /6061Al composites and eliminate the internal pores of material to improve the tensile strength of material. Under the action of external tensile force, the sample first appears cracks at the interface between reinforced particles and base material, and then the cracks expand to disconnect the sample as a whole. T6 treatment for sample after hot rolling can effectively eliminate the residual stress at the interface between reinforced particles and aluminum base material caused by rolling, improve the wettabilitybetween reinforced particles and base material, so as to improve the tensile strength of material. Under the action of external tensile force,the reinforced particles in the sample crack first, and then the whole sample breaks after the cracks expand. With the increasing of rolling compression ratio, the tensile strength of SiCp /6061Al composites increases first and then decreases, and the tensile strength of hotrolling+T6 treatment sample with a rolling compression ratio of 60% reaches the maximum at room temperature and 200 ℃, which are 350

and 290 MPa, respectively.

Funds：

陕西省自然科学基础研究计划项目(2020JM-645)

作者简介: 刘守法(1980-), 男, 硕士, 副教授 E-mail: liushoufa807456@ 163. com

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