A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega
A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega
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含有有序 β TiFe、α 和 omega 的二元 β 钛高温合金
DOI:
10.1016/j.scriptamat.2021.113905
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发表时间:
2021
影响因子:
6
通讯作者:
Jones R
中科院分区:
文献类型:
--
作者:
Jones R
Alpha-beta titanium alloys excel for aeroengine applications but are typically limited to ~550°C. An alternative strategy is reinforcement with the ordered-beta TiFe intermetallic, toward ‘β-Ti superalloys’, however, there has been minimal study of TiFe precipitation in the binary system.Here, a Ti-20Fe (at.%) alloy was homogenised at 1050°C in the β-Ti phase field and aged at 600°C where the Fe supersaturation promoted TiFe precipitation. Curiously, as the TiFe volume fraction increased, the alloy hardness decreased, due to an interplay of mechanisms: (1) Fe solid solution strengthening, which reduces as the β-Ti Fe content falls to 16.2% on ageing; (2) ω precipitation strengthening, as ω-like incommensurate modulated domains were identified by transmission electron microscopy in the homogenised β-Ti parent phase and are suggested to change in size and structure after ageing, resulting in reduced ω-strengthening; (3) softening as softer TiFe and α-Ti phases precipitate from the harder ω‑strengthened β-Ti parent phase.
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DOI:
--
发表时间:
1970
期刊:
影响因子:
--
作者:
N. A. Vanderpuye;A. Miodownik
通讯作者:
A. Miodownik
DOI:
--
发表时间:
1968
期刊:
影响因子:
--
作者:
R. Scholl;D. Larson;E. J. Freise
通讯作者:
E. J. Freise
影响因子:
0.6
作者:
G. Nosova;N. B. D’yakonova;I. V. Lyasotskii
通讯作者:
I. V. Lyasotskii
影响因子:
6.2
作者:
Das, J.;Kim, K. B.;Eckert, J.
通讯作者:
Eckert, J.
影响因子:
9.4
作者:
Vo, Nhon Q.;Liebscher, Christian H.;Dunand, David C.
通讯作者:
Dunand, David C.