DOI: 10.1557/proc-308-725. Internal Strains and Relaxations in Lamellar TiAl

Internal Strains and Relaxations in Lamellar TiAl

10.1557/proc-308-725

Crossref journal-article

Springer Science and Business Media LLC

MRS Proceedings (297)

Abstract

ABSTRACTIn the lamellar form of the ordered intermetallic TiAl, mismatches at the lamellar interfaces, of order 1%, give rise to internal stresses and lo interracial dislocations. The geometry of the microstructure ensures extreme plastic anisotropy. Three main trends are evident in the plastic tensile properties: Both the yield and fracture stresses are low when deformation occurs in the plane of the lamellae and they are high when deformation occurs across the lamellae, the ductility is high when the tensile axis lies close to the lamellar plane and low when the tensile axis is nearly normal to the lamellar plane. The variations of the yield stress and the fracture stress are explained principally by the effects of Schmid factors and anisotropies in the Hall-Petch (or Stroh) stresses resulting from the lamellar shapes. The variation in ductility may be understood in terms of a competition between the ductile propagation of dislocations across interfaces and the creation of Stroh cracks at the heads of dislocation pile-ups.

Bibliography

Hazzledine, P. M., Kad, B. K., & Mendiratta, M. G. (1993). Internal Strains and Relaxations in Lamellar TiAl. MRS Proceedings, 308.

Authors 3

P.M. Hazzledine (first)
B.K. Kad (additional)
M.G. Mendiratta (additional)

References 14 Referenced 5

{'key': 'S1946427400321467_ref014', 'first-page': '1339', 'volume': '32', 'author': 'Nakano', 'year': '1992', 'journal-title': 'I.S.I.J International'} / I.S.I.J International by Nakano (1992)
{'key': 'S1946427400321467_ref012', 'first-page': '201', 'volume': '18', 'author': 'Kad', 'year': '1990', 'journal-title': 'Microstructural Science'} / Microstructural Science by Kad (1990)
{'key': 'S1946427400321467_ref010', 'first-page': '404', 'volume': 'A223', 'author': 'Stroh', 'year': '1954', 'journal-title': 'Proc. Roy. Soc.'} / Proc. Roy. Soc. by Stroh (1954)
10.1080/09500839208229275
10.1016/0079-6425(90)90002-Q
10.1080/14786437408222071
{'key': 'S1946427400321467_ref001', 'first-page': '216', 'volume': 'A198', 'author': 'Frank', 'year': '1949', 'journal-title': 'Proc. Roy. Soc.'} / Proc. Roy. Soc. by Frank (1949)
9 Rao S. and Woodward C. , Private Communication (1993)
10.1016/0956-716X(92)90066-N
10.1557/PROC-273-81
13 Couret A. , Private Communication (1992)
10.1016/0956-7151(92)90472-Q
10.1557/PROC-288-495
10.1080/01418619008244339

Dates

Type	When
Created	14 years, 5 months ago (March 5, 2011, 6:31 p.m.)
Deposited	4 years, 6 months ago (Feb. 24, 2021, 4:12 p.m.)
Indexed	3 years, 3 months ago (May 4, 2022, 3:33 a.m.)
Issued	32 years, 7 months ago (Jan. 1, 1993)
Published	32 years, 7 months ago (Jan. 1, 1993)
Published Online	14 years, 6 months ago (Feb. 15, 2011)
Published Print	32 years, 7 months ago (Jan. 1, 1993)

Funders 0

None

BibTeX

@article{Hazzledine_1993, title={Internal Strains and Relaxations in Lamellar TiAl}, volume={308}, ISSN={1946-4274}, url={http://dx.doi.org/10.1557/proc-308-725}, DOI={10.1557/proc-308-725}, journal={MRS Proceedings}, publisher={Springer Science and Business Media LLC}, author={Hazzledine, P.M. and Kad, B.K. and Mendiratta, M.G.}, year={1993} }

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