Discontinuous and continuous precipitation in Cu-13 wt. Sn and Al-20 wt. Ag alloys

Hamana D.; Fatmi M.; Chekroud S.Boumerzoug Z.

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Discontinuous and continuous precipitation in Cu-13 wt. Sn and Al-20 wt. Ag alloys

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The relation between the continuous and discontinuous precipitations, and the discontinuous precipitation kinetics and mechanisms in Cu-13 wt. Sn and Al-20 wt. Ag alloys, have been investigated by metallographic observations, differential scanning calorimetry, X-ray diffraction and microhardness measurements. During ageing of the supersaturated solid solution of AI-Ag, after the preprecipitation of the Guinier Preston zones and the continuous precipitation of the plates of the transition phase gamma(3). the cellular precipitation of the equilibrium phase gamma occurs and grows from the grain boundaries but lamellae are not perpendicular to the reaction front. At high temperature intergranular precipitation occurs without the reaction front or cell. Both types of precipitation occur in the Cu-13 wt. Sn alloy but very slowly. However, continuous precipitation predominates after a high deformation amount and reduces the amount of chemical driving energy available for both the initiation and propagation of discontinuous precipitation. (C) 1998 Elsevier Science S.A. All rights reserved. References: 15

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《Materials Chemistry and Physics》 |1998年第3期|208-216|共9页
作者
Hamana D.; Fatmi M.; Chekroud S.Boumerzoug Z.;
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作者单位

Univ Constantine, Res Unit Mat Phys & Applicat, Ain El Bey Rd, Constantine 25000, Algeria.;

bh.med.kyoto-u.ac.jp;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;工程基础科学;
关键词
Continuous precipitation; Discontinuous precipitation; Supersaturated alloys; Gp zones; Al-ag; Growth;

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Discontinuous and continuous precipitation in Cu-13 wt. Sn and Al-20 wt. Ag alloys

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