低弹性模量beta钛合金的制备和性能.pdfVIP

25 4 Vol.25 No.4 2 0 1 1 8 CHINESE JOURNAL OF MATERIALS RESEARCH August 2 0 1 1 β ( 610065) β Ti–8Mo–8Zr–4.5Sn–2Mn, X : β β , ; 41.4 GPa TMA (Ti–11.5Mo–6Zr–4.5Sn) , e/ad Bo d Md : d Md , Bo , , , β , , d– , TG146 1005-3093(2011)04-0369-04 A New Beta Titanium Alloy of Low Elastic Modulus GE Xiangnan ZHU Dachuan∗ FENG Zuoming (School of Materials Science and Engineering, Sichuan University, Chengdu 610065) Manuscript received July 27, 2010; in revised form April 22, 2011. * To whom correspondence should be addressed, Tel:(028 E–mail: zdc89@163.com ABSTRACT A new beta titanium alloy Ti–8Mo–8Zr–4.5Sn–2Mn was designed, and melted by non– consumable electric arc furnace in argon atmosphere. The metallographic microstructure, the crystal texture, hardness and elastic modulus were characterized by microscope, X–ray diffractometer and nano– hardness Tester. The results show that the alloy contains dendritic structure and equiaxed grain structure, exists alloying element segregation and has the elastic modulus with 41.4GPa. Meanwhile, comparing to TMA(Ti–11.5Mo–6Zr–4.5Sn), the effects of the electron concentration e/a, the combined number Bo and the d electron orbital energy level Md on the elastic modulus were investigated. The conclusions was obtained that the low of Bo and Md and the increase of e/a are beneficial to reduce the elastic modulus of alloy. KEY WORDS metallic materials, β–Ti alloy, elastic modulus, d–electron theory of alloys, electron concentration ( β ) , 49% , , ,