Advanced Titanium Alloys Containing Micrometer-size Particles
The chip formation process and the grain size stability at elevated temperature of different titanium alloys like CP-titanium,Ti 6A1 2Sn 4Zr 2Mo, Ti 6A1 4V,Ti 5A1 5V 5Mo 3Cr 0. 5Fe and Ti 15V 3A1 3Cr 3Sn have been studied. All titanium alloys containing more than 50％ α-phase at room temperature and aged metastable β-alloys form segmented chips independent of the cutting conditions. Solution treated metastable β- and β-alloys on the other hand show a cutting parameter dependent change from continuous to segmented chip formation. Heat treatments above β-transus lead to severe grain growth of all alloys. Small amounts of lanthanum and erbium have been added to distribute micrometer-size second-phase particles in the titanium matrix. In general, metallic lanthanum particles lead to improved machinability and the formation of short breaking chips,intermetallic compounds containing rare earth metals and pure erbium particles do not improve the machinability. Grain growth is hindered by all kinds of second-phase precipitates.
Titanium (Ti) rare earth metals lanthanum (La) erbium (Er) advanced titanium alloys free-machining titanium grain size stability
Carsten Siemers Florian Brunke Marianne Stache Judith Laukart Badya Zahra Joachim R(o)sier Pawel Rokicki Karel Saksl
Technische Universitdt Braunschweig, Institut fur Werkstoffe ,38106 Braunschweig, Germany Slovak Academy of Sciences, Institute of Materials Research, 04353 Kosice, Slovak Republic
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
883-887
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）