Effect of Cold Rolling and Heat Treatment on Microstructures and Mechanical Properties in Ti-13Cr-1Fe-3Al Alloys
Thermomechanical processing is effective for improving the strength and toughness in metallic materials due to grain refinement. The strengthductility balance in β-type titanium alloys can be enhanced by refinement of the β matrix grain size and α precipitation by aging. For improving the strength-ductility balance in Ti-13Cr-1Fe3Al alloys, the effects of β grain size on isothermal aging behavior and mechanical properties in Ti-13Cr-1Fe-3Al alloys were investigated. The β grain size was decreased by the following treatments: 50％CR→1073K-l.8ks,70％CR→1048K-3. 6ks and 70％CR→1048K-0. 6ks. Resistivity (ρRT and ρLN) and resistivity ratio (ρLN/ρRT) in the 84,71 and 40μm specimens started decreasing later than in the 309μm specimen with isothermal aging at 673K. Tensile properties were not sensitive to the β matrix grain size in the STQ and recrystallized states. In the STQ and recrystallized specimens,the tensile strength and elongation were roughly 800MPa and 30％,respectively. Specimens after aging showed higher tensile strength and lower elongation compared to the STQ ones. The specimen with the β grain size of 40μm after aging at 673K for 600ks showed good strength-ductility balance in all specimens.
Thermomechanical processing β-type titanium alloy mechanical properties microstructures
Yuji TAKASAKI Masato UEDA Masahiko IKEDA
Graduate student of Kansai University,Suita 564-8680,Japan Faculty of Chemistry,Materials and Bioengineering,Kansai University,Suita 564-8680,Japan
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
577-579
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）