太原理工大学学报Issue(5)：495-498,503,5.DOI:10.16355/j.cnki.issn1007-9432tyut.2015.05.003
基于红外热像法对5A06铝合金疲劳裂纹扩展中的各向异性研究
Study on Anisotropy of Fatigue Crack Propagation Process of 5A06 Aluminum Alloy Based on Inf rared Thermography
摘要
Abstract
This article uses the infrared thermal imager to record the temperature evolution during the process of fatigue crack propagation of 5A06 aluminum alloy parallel with and perpen‐dicular to the rolling direction .The anisotropy during the process of fatigue crack propagation in two directions has been researched .The temperature evolution during fatigue crack propagation process show s three stages :initial slow temperature rise stage ,rapid temperature rise stage ,and finial temperature decline stage .Under different stresses ,the fracture temperature increase value in parallel with rolling direction is 5.75 ℃ ,3.02 ℃ and 2.77 ℃ ,respectively ,and that in per‐pendicular to the rolling direction is 10.73℃ ,5.03℃ and 3.53℃ ,respectively .Under the same stress ,the fatigue crack propagation rate in parallel rolling direction is higher than that in per‐pendicular rolling direction , and the fracture temperature in perpendicular rolling direction is higher than that in parallel rolling direction .When the crack extends same distance ,samples in transverse direction consume more energy and longer time than in longitudinal direction .The re‐sult has a good consistency with the temperature change .The crack propagation rate is difficult to be measured ,so the anisotropy during the process of fatigue crack propagation can be indirect‐ly presented by the temperature recorded by infrared thermography .关键词
5A06铝合金/疲劳裂纹扩展/红外热像仪/各向异性Key words
aluminum alloy/fatigue crack propagation/infrared thermography/anisotropy分类
矿业与冶金引用本文复制引用
陈鹏达,王钟楠,许泽清,张红霞,李永莲,周翠兰..基于红外热像法对5A06铝合金疲劳裂纹扩展中的各向异性研究[J].太原理工大学学报,2015,(5):495-498,503,5.基金项目
国家自然科学基金资助项目基于红外温度场特征的镁合金焊接接头疲劳断裂行为与评定理论研究（51175364）；山西省自然科学基金资助项目镁合金焊接接头红外疲劳断裂机理和疲劳极限方法研究 （）
