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Title: C-axis tensile deformation of Ti{sub 3}Al with the DO{sub 19} structure at room temperature

Abstract

The tensile deformation behavior of single crystals of Ti{sub 3}Al (Ti-25 at.% Al) deformed in tension parallel to the c-axis has been studied at room temperature as a function of the thickness of tensile specimens. While premature fracture always precedes any plastic flow when the specimen thickness is larger than 300 {micro}m, a 0.3--0.4% plastic strain is observed when the specimen thickness is reduced to 150 {micro}m. The slip plane observed in tension is {l{underscore}brace}20{bar 2}{bar 1}{r{underscore}brace}, which is different from {l{underscore}brace}11{bar 2}{bar 1}{r{underscore}brace} observed in compression. Assuming that slip on {l{underscore}brace}20{bar 2}{bar 1}{r{underscore}brace} occurs along {l{underscore}angle}11{bar 2}6{r{underscore}angle}, the critical resolved shear stress (CRSS) value is estimated to be 420 MPa, which is a little lower than 450 MPa obtained for slip on {l{underscore}brace}11{bar 2}{bar 1}{r{underscore}brace}. The slip plane selection depending on the sense of applied stress (i.e., tension or compression) and the relative magnitude of CRSS values are consistent with the reported results of atomistic studies on the core structure of 1/3{l{underscore}angle}11{bar 2}3{r{underscore}angle} dislocations in a model h.c.p. lattice.

Authors:
; ; ;
Publication Date:
Research Org.:
Kyoto Univ., Sakyo (JP)
OSTI Identifier:
20000482
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 47; Journal Issue: 12; Other Information: PBD: 29 Sep 1999; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; TENSILE PROPERTIES; TITANIUM ALLOYS; ALUMINIUM ALLOYS; INTERMETALLIC COMPOUNDS; MONOCRYSTALS; STRESSES; STRAINS; SLIP; MICROSCOPY

Citation Formats

Kishida, K, Yoshikawa, J, Inui, H, and Yamaguchi, M. C-axis tensile deformation of Ti{sub 3}Al with the DO{sub 19} structure at room temperature. United States: N. p., 1999. Web. doi:10.1016/S1359-6454(99)00209-8.
Kishida, K, Yoshikawa, J, Inui, H, & Yamaguchi, M. C-axis tensile deformation of Ti{sub 3}Al with the DO{sub 19} structure at room temperature. United States. https://doi.org/10.1016/S1359-6454(99)00209-8
Kishida, K, Yoshikawa, J, Inui, H, and Yamaguchi, M. 1999. "C-axis tensile deformation of Ti{sub 3}Al with the DO{sub 19} structure at room temperature". United States. https://doi.org/10.1016/S1359-6454(99)00209-8.
@article{osti_20000482,
title = {C-axis tensile deformation of Ti{sub 3}Al with the DO{sub 19} structure at room temperature},
author = {Kishida, K and Yoshikawa, J and Inui, H and Yamaguchi, M},
abstractNote = {The tensile deformation behavior of single crystals of Ti{sub 3}Al (Ti-25 at.% Al) deformed in tension parallel to the c-axis has been studied at room temperature as a function of the thickness of tensile specimens. While premature fracture always precedes any plastic flow when the specimen thickness is larger than 300 {micro}m, a 0.3--0.4% plastic strain is observed when the specimen thickness is reduced to 150 {micro}m. The slip plane observed in tension is {l{underscore}brace}20{bar 2}{bar 1}{r{underscore}brace}, which is different from {l{underscore}brace}11{bar 2}{bar 1}{r{underscore}brace} observed in compression. Assuming that slip on {l{underscore}brace}20{bar 2}{bar 1}{r{underscore}brace} occurs along {l{underscore}angle}11{bar 2}6{r{underscore}angle}, the critical resolved shear stress (CRSS) value is estimated to be 420 MPa, which is a little lower than 450 MPa obtained for slip on {l{underscore}brace}11{bar 2}{bar 1}{r{underscore}brace}. The slip plane selection depending on the sense of applied stress (i.e., tension or compression) and the relative magnitude of CRSS values are consistent with the reported results of atomistic studies on the core structure of 1/3{l{underscore}angle}11{bar 2}3{r{underscore}angle} dislocations in a model h.c.p. lattice.},
doi = {10.1016/S1359-6454(99)00209-8},
url = {https://www.osti.gov/biblio/20000482}, journal = {Acta Materialia},
issn = {1359-6454},
number = 12,
volume = 47,
place = {United States},
year = {Wed Sep 29 00:00:00 EDT 1999},
month = {Wed Sep 29 00:00:00 EDT 1999}
}