时效硬化和喷丸处理对7075铝合金表面性能的影响

The Influence of Age Hardening and Shot Peening on the Surface Properties of 7075 Aluminium Alloy.

作者信息

Žagar Sebastjan, Markoli Boštjan, Naglič Iztok, Šturm Roman

机构信息

Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia.

Faculty of Natural Sciences and Engineering, Aškerčeva 12, 1000 Ljubljana, Slovenia.

出版信息

Materials (Basel). 2021 Apr 26;14(9):2220. doi: 10.3390/ma14092220.

DOI:10.3390/ma14092220

PMID:33925876

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8123459/

Abstract

The present study investigates the effect of shot peening (SP) on the mechanical properties and surface roughness of 7075 aluminum alloy during different stages and conditions of heat treatment. The mechanical properties were determined by measuring Vickers microhardness profiles and residual stress profiles, while the amount of alloying elements present in the solid solution of the samples under different heat treatment conditions was determined by measuring the electrical conductivity. The results show that the increase in microhardness near the SP surface and the maximum compressive residual stresses are mainly related to the content of alloying elements in the solid solution. Surface roughness increases with increasing SP Almen intensity, and samples with the highest microhardness and residual stresses have the lowest surface roughness.

摘要

本研究调查了喷丸处理（SP）对7075铝合金在不同热处理阶段和条件下的力学性能及表面粗糙度的影响。通过测量维氏显微硬度分布和残余应力分布来确定力学性能，而通过测量电导率来确定不同热处理条件下样品固溶体中合金元素的含量。结果表明，喷丸处理表面附近的显微硬度增加以及最大压缩残余应力主要与固溶体中合金元素的含量有关。表面粗糙度随着喷丸阿尔门强度的增加而增大，且显微硬度和残余应力最高的样品表面粗糙度最低。