A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega

A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega
复制标题

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
复制
发表时间:
2021
期刊:
影响因子:
6
通讯作者:
Jones R
Jones R
中科院分区:
材料科学1区
文献类型:
--
作者:
Jones R

文献摘要

参考文献

被引文献

相似文献

α - β钛合金在航空发动机应用中表现优异,但通常限于~550°C。另一种替代策略是用有序的β- TiFe金属间化合物来增强“β-Ti高温合金”,然而,对二元体系中TiFe析出的研究很少。在这里,Ti-20Fe (at.%)合金在1050℃的β-Ti相场中均匀化,并在600℃时效,Fe过饱和促进了Fe的析出。随着TiFe体积分数的增加,合金硬度降低,其作用机制如下:(1)Fe固溶强化,时效时随着β-Ti Fe含量降至16.2%,合金硬度降低;(2) ω析出强化,通过透射电镜在均匀化的β-Ti母相中发现了类ω不相称调制畴,表明老化后ω析出强化的大小和结构发生了变化;(3)软化,较软的TiFe和α-Ti相从较硬的ω强化β-Ti母相析出。
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.
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
TiFe、TiCo 和 TiNi 的相对延展性
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
DOI: 10.1007/s11041-006-0111-1
发表时间: 2006
影响因子: 0.6
作者:
G. Nosova;N. B. D’yakonova;I. V. Lyasotskii
通讯作者: I. V. Lyasotskii
DOI: 10.1016/j.jallcom.2006.08.163
发表时间: 2007-05-31
影响因子: 6.2
作者:
Das, J.;Kim, K. B.;Eckert, J.
通讯作者: Eckert, J.
DOI: 10.1016/j.actamat.2014.02.020
发表时间: 2014-06-01
期刊: ACTA MATERIALIA
影响因子: 9.4
作者:
Vo, Nhon Q.;Liebscher, Christian H.;Dunand, David C.
通讯作者: Dunand, David C.