Effect of Mn content on microstructure and mechanical properties of modified ZA-27 alloy

来源期刊：中国有色金属学报(英文版)2002年第6期

论文作者：李元元 龙雁 陈维平 张大童 邵明

文章页码：1091 - 1094

Key words：ZA-27; intermetallic compounds; mechanical properties

Abstract: ZA-27 alloys reinforced by Mn-containing intermetallic compounds were prepared and the effect of Mn content on their mechanical properties were examined. By adding Mn, rare earth elements(RE) and Ti into ZA-27, experimental alloys were fabricated by sand casting. The volume fraction, grain size and morphology of the Mn-containing intermetallic compound phases vary with the changing of Mn content. Mechanical properties of the reinforced ZA-27 alloys at elevated temperatures were measured. The results show that the hardness, compressive strength and compressibility of experimental alloys increase with increasing Mn content until they reach a maximum at 0.5% Mn. Excessive and coarse hard phases would act as crack origins instead of dispersion strengthening particles. Best tensile properties of these alloys at elevated temperature can be achieved at a Mn content of 0.18 %.