Variation of Hardness with Microstructure Evolutions in Metastable β Titanium Alloy TIMETAL®LCB

Abstract:

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Microstructure evolutions and hardness variation during aging in metastable β titanium alloy TIMETAL®LCB have been examined. In as-quenched specimen after solution treatment, athermal ω phase formed. Isothermal ω phase formed during aging at 623 K, and α phase formed after precipitation of isothermal ω phase during aging at 673 and 773 K. Alpha phase nucleated at isothermal ω phase, and had the orientation relationship with β and ω, (111)β//(0001)ω//(1120 )α and [10 1 ]β//[1120 ]ω//[0001]α . During aging at 873 K, α phase formed without isothermal ω phase. Hardness increased with increasing aging time and decreasing aging temperature, partly because number density of isothermal ω or α precipitates increased with increasing aging time and decreasing aging temperature.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

2067-2070

DOI:

10.4028/www.scientific.net/MSF.561-565.2067

Citation:

T. Sakamoto et al., "Variation of Hardness with Microstructure Evolutions in Metastable β Titanium Alloy TIMETAL®LCB", Materials Science Forum, Vols. 561-565, pp. 2067-2070, 2007

Online since:

October 2007

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$35.00

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