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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 9, Iss. 5 — May. 10, 2011
  • pp: 051403–

Microstructure evolution of laser solid forming of Ti-Al-V ternary system alloys from blended elemental powders

Hua Tan, Fengying Zhang, Jing Chen, Xin Lin, and Weidong Huang  »View Author Affiliations


Chinese Optics Letters, Vol. 9, Issue 5, pp. 051403- (2011)


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Abstract

Morphology evolution of prior \beta grains of laser solid forming (LSF) Ti-xAl-yV (x \leq 11,y \leq 20) alloys from blended elemental powders is investigated. The formation mechanism of grain morphology is revealed by incorporating columnar to equiaxed transition (CET) mechanism during solidification. The morphology of prior \beta grains of LSF Ti-6Al-yV changes from columnar to equiaxed grains with increasing element V content from 4 to 20 wt.-%. This agrees well with CET theoretical prediction. Likewise, the grain morphology of LSF Ti-xAl-2V from blended elemental powders changes from large columnar to small equiaxed with increasing Al content from 2 to 11 wt.-%. The macro-morphologies of LSF Ti-8Al-2V and Ti-11Al-2V from blended elemental powders do not agree with CET predictions. This is caused by the increased disturbance effects of mixing enthalpy with increasing Al content, generated in the alloying process of Ti, Al, and V in the molten pool.

© 2011 Chinese Optics Letters

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.3590) Lasers and laser optics : Lasers, titanium
(160.2120) Materials : Elements

Citation
Hua Tan, Fengying Zhang, Jing Chen, Xin Lin, and Weidong Huang, "Microstructure evolution of laser solid forming of Ti-Al-V ternary system alloys from blended elemental powders," Chin. Opt. Lett. 9, 051403- (2011)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-9-5-051403


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