Effect of La and Nd on microstructures and mechanical properties of AZ61 wrought magnesium alloy

来源期刊：中国有色金属学报(英文版)2004年第1期

论文作者：周海涛 曾小勤 丁文江 马春江 朱燕萍

文章页码：67 - 70

Key words：AZ61 alloy; RE; microstructure; mechanical properties

Abstract: Effects of La and Nd addition on the microstructure and mechanical properties of the AZ61 alloy have been investigated. The results show that when La and Nd are added into the AZ61 alloy respectively, the β(Mg₁₇-Al₁₂) phase is refined and granulated, and new phases are formed in the form of small rod-like shape, which are verified as La₃Al₁₁ and Nd₃Al₁₁ phase by X-ray diffraction and TEM observation. Microstructure observations show that the effective efficiency of La addition is higher than that of Nd addition, thus the sizes of β(Mg₁₇Al₁₂) and La₃Al₁₁ phase are relatively smaller than those of β(Mg₁₇Al₁₂) and Nd₃Al₁₁ phases in both AZ61 alloy and Nd-containing alloy. The increase of the tensile strength and elongation of AZ61 alloy refers to the existence of small rod-like La₃Al₁₁and Nd₃Al₁₁ phases, and fine granulated β (Mg₁₇Al₁₂) phase.