Alloy design and coarsening phenomenon of L1{sub 2} precipitates in high-temperature Al-2 at pct (Ti, V, Zr) systems
Journal Article
·
· Metallurgical Transactions, A
OSTI ID:87690
- Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Materials Science and Engineering
Aging works of two melt-spun Al-2 at pct (Ti, V, Zr) alloys showed that metastable L1{sub 2} Al{sub 3}(Ti, V, Zr) precipitates were dominate and did not transform to stable D0{sub 23} ones: the average radius was 3 to 4 nm and the interparticle spacing was 10 to 30 nm at 698 K up to 400 hours. Coarsening kinetics was found to be very sluggish and was coincident with the low lattice mismatch. Due to the low coarsening rate and the high thermal stability of the precipitated phase, rapidly solidified Al-Ti-V-Zr systems show promise as base of high-strength Al alloys for high-temperature applications.
- OSTI ID:
- 87690
- Journal Information:
- Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 7 Vol. 26; ISSN 0360-2133; ISSN MTTABN
- Country of Publication:
- United States
- Language:
- English
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