Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta

Yina Guo; Ronghua Liu; Hao Jin; Rui Yang; Aijun Huang; Mike Loretto

Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta

Yina Guo
, Ronghua Liu
, Hao Jin
, Rui Yang
, Aijun Huang
, Mike Loretto

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

Abstract

The mechanisms of deformation in the gamma and alpha2 phases in PST crystals of Ti46A18Nb and of Ti46A18Ta (at%), which have been deformed in compression, have been investigated using TEM and EBSD. The crystals examined so far were not all perfectly aligned along [0001]α₂ which led to lower flow stresses than would be expected for perfectly aligned [0001]α₂ crystals because most of the strain could be relieved by slip in lamellae in soft orientations. It has been found that the deformation in the gamma in both the Ta and Nb-containing alloys was dominated by twinning which activated α-component slip in the alpha2 in grains where [0001]α₂ was inclined to the stress axis. Virtually no slip has been observed in alpha2 grains, even when the stress axis was close to [0001]α₂.

Original language	English
Title of host publication	Gamma Titanium Aluminide Alloys 2014
Editors	Young-Won Kim, Wilfried Smarsly, Fritz Appel, Dennis M. Dimiduk, Junpin Lin
Publisher	The Minerals, Metals & Materials Society
Pages	135-142
Number of pages	8
ISBN (Electronic)	9781118995587
Publication status	Published - 1 Jan 2014
Externally published	Yes
Event	International Symposium on High-Energy Gamma-Ray Astronomy 2014 - San Diego, United States of America Duration: 16 Feb 2014 → 20 Feb 2014 Conference number: 4th

Publication series

Name	TMS Annual Meeting
Volume	2014-February

Conference

Conference	International Symposium on High-Energy Gamma-Ray Astronomy 2014
Abbreviated title	ISGTA 2014
Country/Territory	United States of America
City	San Diego
Period	16/02/14 → 20/02/14

Keywords

Deformation
PST TiAl
Ti46A18Nb
Ti46A18Ta

Cite this

@inproceedings{898b37fe91be453ab909f4dc395b4e50,

title = "Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta",

abstract = "The mechanisms of deformation in the gamma and alpha2 phases in PST crystals of Ti46A18Nb and of Ti46A18Ta (at\%), which have been deformed in compression, have been investigated using TEM and EBSD. The crystals examined so far were not all perfectly aligned along [0001]α2 which led to lower flow stresses than would be expected for perfectly aligned [0001]α2 crystals because most of the strain could be relieved by slip in lamellae in soft orientations. It has been found that the deformation in the gamma in both the Ta and Nb-containing alloys was dominated by twinning which activated α-component slip in the alpha2 in grains where [0001]α2 was inclined to the stress axis. Virtually no slip has been observed in alpha2 grains, even when the stress axis was close to [0001]α2.",

keywords = "Deformation, PST TiAl, Ti46A18Nb, Ti46A18Ta",

author = "Yina Guo and Ronghua Liu and Hao Jin and Rui Yang and Aijun Huang and Mike Loretto",

year = "2014",

month = jan,

day = "1",

language = "English",

series = "TMS Annual Meeting",

publisher = "The Minerals, Metals \& Materials Society",

pages = "135--142",

editor = "Young-Won Kim and Wilfried Smarsly and Fritz Appel and Dimiduk, \{Dennis M.\} and Junpin Lin",

booktitle = "Gamma Titanium Aluminide Alloys 2014",

address = "United States of America",

note = "International Symposium on High-Energy Gamma-Ray Astronomy 2014, ISGTA 2014 ; Conference date: 16-02-2014 Through 20-02-2014",

}

Guo, Y, Liu, R, Jin, H, Yang, R, Huang, A & Loretto, M 2014, Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta. in Y-W Kim, W Smarsly, F Appel, DM Dimiduk & J Lin (eds), Gamma Titanium Aluminide Alloys 2014. TMS Annual Meeting, vol. 2014-February, The Minerals, Metals & Materials Society, pp. 135-142, International Symposium on High-Energy Gamma-Ray Astronomy 2014, San Diego, California, United States of America, 16/02/14.

Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta. / Guo, Yina; Liu, Ronghua; Jin, Hao et al.
Gamma Titanium Aluminide Alloys 2014. ed. / Young-Won Kim; Wilfried Smarsly; Fritz Appel; Dennis M. Dimiduk; Junpin Lin. The Minerals, Metals & Materials Society, 2014. p. 135-142 (TMS Annual Meeting; Vol. 2014-February).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

TY - GEN

T1 - Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta

AU - Guo, Yina

AU - Liu, Ronghua

AU - Jin, Hao

AU - Yang, Rui

AU - Huang, Aijun

AU - Loretto, Mike

N1 - Conference code: 4th

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The mechanisms of deformation in the gamma and alpha2 phases in PST crystals of Ti46A18Nb and of Ti46A18Ta (at%), which have been deformed in compression, have been investigated using TEM and EBSD. The crystals examined so far were not all perfectly aligned along [0001]α2 which led to lower flow stresses than would be expected for perfectly aligned [0001]α2 crystals because most of the strain could be relieved by slip in lamellae in soft orientations. It has been found that the deformation in the gamma in both the Ta and Nb-containing alloys was dominated by twinning which activated α-component slip in the alpha2 in grains where [0001]α2 was inclined to the stress axis. Virtually no slip has been observed in alpha2 grains, even when the stress axis was close to [0001]α2.

AB - The mechanisms of deformation in the gamma and alpha2 phases in PST crystals of Ti46A18Nb and of Ti46A18Ta (at%), which have been deformed in compression, have been investigated using TEM and EBSD. The crystals examined so far were not all perfectly aligned along [0001]α2 which led to lower flow stresses than would be expected for perfectly aligned [0001]α2 crystals because most of the strain could be relieved by slip in lamellae in soft orientations. It has been found that the deformation in the gamma in both the Ta and Nb-containing alloys was dominated by twinning which activated α-component slip in the alpha2 in grains where [0001]α2 was inclined to the stress axis. Virtually no slip has been observed in alpha2 grains, even when the stress axis was close to [0001]α2.

KW - Deformation

KW - PST TiAl

KW - Ti46A18Nb

KW - Ti46A18Ta

UR - https://www.scopus.com/pages/publications/84931455351

M3 - Conference Paper

AN - SCOPUS:84931455351

T3 - TMS Annual Meeting

SP - 135

EP - 142

BT - Gamma Titanium Aluminide Alloys 2014

A2 - Kim, Young-Won

A2 - Smarsly, Wilfried

A2 - Appel, Fritz

A2 - Dimiduk, Dennis M.

A2 - Lin, Junpin

PB - The Minerals, Metals & Materials Society

T2 - International Symposium on High-Energy Gamma-Ray Astronomy 2014

Y2 - 16 February 2014 through 20 February 2014

ER -

Deformation of PST crystals of Ti46A18Nb and Ti46A18Ta

Abstract

Publication series

Conference

Keywords

Other files and links

Cite this