Effect of Gd content on microstructure and conductivity of 3003 aluminum alloy

doi:10.13251/j.issn.0254-6051.2023.09.023

Abstract

Abstract: Effect of Gd content on microstructure of as-cast and homogenized 3003 aluminum alloy was studied by means of phase diagram software (Pandat), optical microscope (OM), scanning electron microscope (SEM) and conductivity measurement. The results show that with the increase of Gd content from 0 to 0.3wt%, the average grain size in the homogenized structure decreases from 407.88 μm to 201.06 μm. The second phase of the as-cast 3003 aluminum alloy after adding Gd element is Al₆FeMn in long strip shape and Al₃Gd in bright white granular shape. After homogenization at 560 ℃ for 24 h, the second phase is mainly granular and acicular Al₆Mn and short rod GdMn₂Al₁₀. When the Gd content is 0.2wt%, fine grains and a uniformly distributed second phase can be obtained in the alloy, with the highest conductivity of 29.97%IACS.

Key words: 3003 alloy, Gd, grain size, second phase, conductivity

CLC Number:

TG146.2⁺1

Huang Yuanchun, Ma Shangkun, Liu Yu, Yan Jijun, Wu Zhenli. Effect of Gd content on microstructure and conductivity of 3003 aluminum alloy[J]. Heat Treatment of Metals, 2023, 48(9): 129-135.

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