成都大学学报（自然科学版）2024，Vol.43Issue(2)：180-187,8.DOI:10.3969/j.issn.1004-5422.2024.02.010
6061铝合金表面低塑性应变成型及其疲劳改性研究
Study on Low Plastic Strain Forming and Fatigue Modification of 6061 Aluminum Alloy
摘要
Abstract
This paper focuses on the analysis of the influence of low plasticity polishing process parameters such as rolling times,lathe speed on the surface properties of 6061 aluminum alloy.Good fatigue strength-ening effect can all be obtained under these speeds.The 300 r/min speed can obtain the best strengthe-ning effect through rolling three times.Also,either the 900 r/min speed rolling twice or the 1 500 r/min speed rolling three times has a better hardening effect.Combined with the microhardness distribution of the section after rolling and the SEM fracture characterization analysis,it was found that the specimens that rolled once at a processing speed of 300 r/min showed the fracture caused by shear force,while the specimens that rolled twice and three times at 300 r/min and at a processing speed of 900 r/min showed the initiation behavior of multiple fatigue sources.While,the sample with a processing speed of 1 500 r/min was subjected to 3 rounds of rolling,where fatigue source originated internally.The consideration of strain rate dependent surface low plastic strain will significantly improve the fatigue service performance of 6061 aluminum alloy,providing new technical support for the further widespread application of aluminum alloy materials.关键词
6061铝合金/低塑性应变/疲劳断口/显微硬度/疲劳性能Key words
6061 aluminum alloy/low plastic strain/fatigue fracture/microhardness/fatigue properties分类
矿业与冶金引用本文复制引用
陈建新,陈茂林,丁泓月,崔驿墩,王卿州,马娟,朱振宇..6061铝合金表面低塑性应变成型及其疲劳改性研究[J].成都大学学报（自然科学版）,2024,43(2):180-187,8.基金项目
2021年四川省大学生创新创业训练计划项目(S202211079046) （S202211079046）
四川省科技厅科技计划项目(2022NSFSC0328) （2022NSFSC0328）
