Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 1507-1515 |
| Journal / Publication | Materials Science and Technology (United Kingdom) |
| Volume | 36 |
| Issue number | 14 |
| Online published | 23 Jul 2020 |
| Publication status | Published - 2020 |
| Externally published | Yes |
Link(s)
Abstract
Low cycle fatigue of lamellar TiAl with 8.5 at.-%Nb was studied with a total strain amplitude of 0.28% at three temperatures: room temperature, 750°C and 900°C. At room temperature, the material exhibited cyclic hardening and the fracture mode was mainly interlamellar. At 750°C and 900°C, the material showed cyclic softening and the fracture mode was translamellar. The lattice strain in γ phase was almost tensile and larger tensile lattice strain in γ phase seems detrimental. Besides, the opposite direction of {201}γ and {100}α2 lead to crack propagation along α2/γ interfaces. B2/βo phase always suffered compressive lattice strain in the tests. The destruction of lamellar microstructure was the reason for colony refinement at 750°C and 900°C.
Research Area(s)
- cyclic stress–strain behaviour, fracture behaviour, low cycle fatigue, phase transformation, recrystallization, TiAl alloys
Citation Format(s)
Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy. / Ding, Jie; Shi, Shan; Dong, Zhili et al.
In: Materials Science and Technology (United Kingdom), Vol. 36, No. 14, 2020, p. 1507-1515.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
