Effect of Aging on Acoustic Emission Behaviour During Tensile Deformation of an Al-Li-Cu-Mg-Zr Alloy
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概要
- 論文の詳細を見る
The tensile test of an aged Al-Li-Cu-Mg-Zr alloy was carried out to clarify the relationship between the detected acoustic emission (AE) activities and the dynamic behaviour of the microstructures including dislocations, precipitates, and secondary phases. The AE activities had the maximum value in the underaged condition near the yield point of the stress-strain curves. Afterward, the AE activities decreased progressively with aging. The AE did not occur in the peak- and overaged conditions. Both the continuous-type and the burst-type signals which depend upon the avalanche of the dislocation motion and the shear of precipitates, respectively, have been detected at the same time. By transmission electron microscope, superlattice dislocations, metastable δ'phases and the increase of dislocation density were observed in the underaged condition where the AE activities showed a peak. According to these results, it was assumed that the AE sources of this alloy during tensile deformation were the shear of metastable δ'phases and the avalanche of dislocation motion.
- 一般社団法人日本機械学会の論文
- 1990-07-15
著者
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Takagi Hitoshi
Department Of Internal Medicine And Molecular Science Graduate School Of Medicine Gunma University
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Sakamaki Kiyoshi
Department Of Mechanical Engineering Tokushima University
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Yoshida Masafumi
Department Of Mechanical Engineering Tokushima University
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Yoshida Masafumi
Department Of Chemistry Faculty Of General Education Kumamoto University
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Yoshida Kenichi
Department Of Forensic Medicine Graduate School Of Medicine University Of Tokyo
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Yoshida Kenichi
Department Of Mechanical Engineering Tokushima University
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Takagi Hitoshi
Department Of 1st Internal Medicine Gunma University School Of Medicine
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