Al-Mg-Ge合金の時効現象

鈴木 寿; 菅野 幹宏; 伊藤 吾朗

doi:10.2464/jilm.31.232

Aging phenomena of Al-Mg-Ge alloys

Hisashi SUZUKI, Motohiro KANNO, Goroh ITOH

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JOURNAL FREE ACCESS

1981 Volume 31 Issue 4 Pages 232-239

DOI https://doi.org/10.2464/jilm.31.232

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Published: April 30, 1981 Received: September 03, 1980 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 23, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : The aging behavior of Al-(0.7-1.1)at%Mg-0.4at%Ge alloys subjected to normal aging and two-step aging was studied comparing with the previous results of Al-Mg-Si alloys. Nearly the same behavior as in the Al-Mg-Si alloy is found: (α+Mg₂Ge) two phase alloy shows a following Precipitation sequence, solid solution →cluster→needle-shaped G.P. zone→rod-shaped intermediate phase→cube-shaped intermediate phase→plateshaped equilibrium phase; the alloy attain a maximum hardness in the state of G.P. zones. The maximum hardness value of the alloy step-aged (pre-aged at 20-150°C and finally aged at 175°C) is always lower than that normally aged. The negative effect of two-step aging is more marked in this alloy system. Discussions on the difference of the negative effect between both systems are given.
Right : The aging behavior of Al-(0.7-1.1)at%Mg-0.4at%Ge alloys subjected to normal aging and two-step aging was studied comparing with the previous results of Al-Mg-Si alloys. Nearly the same behavior as in the Al-Mg-Si alloy is found: (α+Mg₂Ge) two phase alloy shows a following erecipitation sequence, solid solution →cluster→needle-shaped G.P. zone→rod-shaped intermediate phase→cube-shaped intermediate phase→plateshaped equilibrium phase; the alloy attain a maximum hardness in the state of G.P. zones. The maximum hardness value of the alloy step-aged (pre-aged at 20-150°C and finally aged at 175°C) is always lower than that normally aged. The negative effect of two-step aging is more marked in this alloy system. Discussions on the difference of the negative effect between both systems are given.

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The aging behavior of Al-(0.7-1.1)at%Mg-0.4at%Ge alloys subjected to normal aging and two-step aging was studied comparing with the previous results of Al-Mg-Si alloys. Nearly the same behavior as in the Al-Mg-Si alloy is found: (α+Mg₂Ge) two phase alloy shows a following erecipitation sequence, solid solution →cluster→needle-shaped G.P. zone→rod-shaped intermediate phase→cube-shaped intermediate phase→plateshaped equilibrium phase; the alloy attain a maximum hardness in the state of G.P. zones. The maximum hardness value of the alloy step-aged (pre-aged at 20-150°C and finally aged at 175°C) is always lower than that normally aged. The negative effect of two-step aging is more marked in this alloy system. Discussions on the difference of the negative effect between both systems are given.

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