Internal friction measurements of a stress-corroded Al-Zn-Mg alloy
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In order to know the correlation between the stress corrosion racking and the internal friction which is sensitive to structural changes, the internal friction has been measured in an Al-Zn-Mg alloy which is easily subjected to stress corrosion cracking. The natural decay of the transverse resonance vibration was utilized to measure the internal friction of specimens after stress corrosion tests in an aqueous solution (CrO3 70g/l, NaCl 30g/l and K2Cr2O7 60g/l) under tensile stress of 98% of yield strength. Results obtained are as follows:(1) When the amplitude independent internal friction began to increase, the stress corrosion cracking was not detected by an optical microscope. This observation indicates that plastic deformation occurs.(2) The harder the yield stress was, the earlier occurred the stress corrosion cracking.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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