o相和γ相含量降低，α2相含量明顯增加，片層組織含量提高，片層間距減 小。TMMW合金具有更高的顯微硬度和更佳的耐磨性與W替代后合金組織、相構(gòu)成變化有密切關(guān)系。W替代部分Mo后合金βo相含量減少、片層含量的提高及片層厚度的降低是合金具有更高拉伸強(qiáng)度和更優(yōu)室溫延伸率的主要原因。;The wear resistance and tensile property of two low-cost, easy-to-deform Ti-44Al-3Mn-0.8Mo (TMM) and Ti-44Al-3Mn-0.4Mo-0.4W(TMMW) alloys (atomic fraction, %, the same below) were comparatively tested. The effects of replacing 0.8 Mo with 0.4Mo-0.4W on their wear resistance, microhardness, tensile property and microstructure were analyzed. The results show that replacing part of Mo with W can obviously improve the wear resistance and microhardness of Ti-Al-Mn-Mo alloy, and also increase the tensile strength of the alloy at room temperature and high temperature. The room temperature elongation is increased from 0.75% to 1.50%, while the high temperature elongation is slightly reduced. It is found that the β-stabilizing effect of W in the alloys is slightly weaker than that of Mo, and the replacement of W reduces the content of βo phase and γ phase remaining in the structure, increases the content of α2 phase obviously, increases the content of lamellar structure, and decreases the lamellar spacing. The higher microhardness and better wear resistance of TMMW alloy are closely related to the changes of microstructure and phase composition. The decrease in βo phase content, the increase in lamellar content and the decrease in lamellar thickness are the main reasons for the higher tensile strength and better room temperature elongation of the alloy after W replaces part of Mo."/>