温度对铝合金残余应力检测误差的影响分析

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温度对铝合金残余应力检测误差的影响分析
Analysis of the effect of temperature on residual stress test errors of aluminum alloy
2018年48卷第3期页码：130-133
纸质出版：2018
DOI：
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孙晓红, 孟立春, 李晓东, 等. 温度对铝合金残余应力检测误差的影响分析[J]. 电焊机, 2018,48(3):130-133. DOI：

SUN Xiaohong, MENG Lichun, LI Xiaodong, et al. Analysis of the effect of temperature on residual stress test errors of aluminum alloy[J]. Eletric Welding Machine2018, 48(3): 130-133. DOI：

温度是影响超声波残余应力测试精度的重要因素。利用环境实验室

研究温度对A7N01P-T4铝合金焊接接头中母材、热影响区、焊缝的影响

并建立了温度修正模型。结果表明:当测试温度较低时（0

8℃）

温度对声弹性效应的影响占据主导地位

而声弹性效应与温度的关系与所测试的材料无关。当测试温度较高时

弹性模量E和密度ρ随温度变化明显

当修正温度为2

8℃时

温度修正模型为Δσ=K[t-（0.414 05T-0.874 06）]。

Temperature is the key factor in the accuracy of residual stress test by ultrasonic. The effects of temperature on the base metal

the heat affected zone and the weld of A7 N01 P-T4 aluminum alloy welded joints were studied in environment lab

and then the temperature modified model was established in this paper. The results showed that when the temperature was at lower temperature（0

8 ℃）

the temperature played the leading role in the effect on acoustoelastic effect

but the relationship between acoustoelastic effect and temperature had nothing to do with the testing materials. When the temperature raised

the elastic modulus E and density ρ changed obviously. When the modified temperature was at 2

8 ℃

the temperature modified model was Δσ =K [t-（0.414 05 T-0.874 06）].

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