Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy

G. W. Qin; K. Oikawa; G. D.W. Smith; S. M. Hao

doi:10.1016/S0966-9795(03)00102-X

Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy

G. W. Qin, K. Oikawa, G. D.W. Smith, S. M. Hao

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Wire electric discharge machining (Wire-EDM) induced a new phase in Ti-46Al-2Cr (in at.%) intermetallic alloy has been identified by using X-ray diffraction technique. The new phase is found to be neither TiO₂ nor Al₂O₃, but well consistent with fcc structure titanium hydride with the lattice parameter of 4.49-4.50 Å. The new phase exists in the wire-EDM cut alloy surface layer limiting to about 70 μm thick, much deeper than the wire-EDM induced recast layer thickness of 2-3 μm. One processing, vacuum annealing at 400-600 °C, has been proposed to remove this hydride induced by wire-EDM. In addition, The wire-EDM induced microcracks extensively happen on the EDM-cut surface and penetrate into matrix up to 10-30 μm.

Original language	English
Pages (from-to)	907-910
Number of pages	4
Journal	Intermetallics
Volume	11
Issue number	9
DOIs	https://doi.org/10.1016/S0966-9795(03)00102-X
Publication status	Published - 2003 Sept

Keywords

A. Titanium aluminides, based on TiAl
C. Electric discharge machining
F. X-ray diffraction

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10.1016/S0966-9795(03)00102-X

Cite this

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title = "Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy",

abstract = "Wire electric discharge machining (Wire-EDM) induced a new phase in Ti-46Al-2Cr (in at.%) intermetallic alloy has been identified by using X-ray diffraction technique. The new phase is found to be neither TiO2 nor Al2O3, but well consistent with fcc structure titanium hydride with the lattice parameter of 4.49-4.50 {\AA}. The new phase exists in the wire-EDM cut alloy surface layer limiting to about 70 μm thick, much deeper than the wire-EDM induced recast layer thickness of 2-3 μm. One processing, vacuum annealing at 400-600 °C, has been proposed to remove this hydride induced by wire-EDM. In addition, The wire-EDM induced microcracks extensively happen on the EDM-cut surface and penetrate into matrix up to 10-30 μm.",

keywords = "A. Titanium aluminides, based on TiAl, C. Electric discharge machining, F. X-ray diffraction",

author = "Qin, {G. W.} and K. Oikawa and Smith, {G. D.W.} and Hao, {S. M.}",

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T1 - Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy

AU - Qin, G. W.

AU - Oikawa, K.

AU - Smith, G. D.W.

AU - Hao, S. M.

PY - 2003/9

Y1 - 2003/9

N2 - Wire electric discharge machining (Wire-EDM) induced a new phase in Ti-46Al-2Cr (in at.%) intermetallic alloy has been identified by using X-ray diffraction technique. The new phase is found to be neither TiO2 nor Al2O3, but well consistent with fcc structure titanium hydride with the lattice parameter of 4.49-4.50 Å. The new phase exists in the wire-EDM cut alloy surface layer limiting to about 70 μm thick, much deeper than the wire-EDM induced recast layer thickness of 2-3 μm. One processing, vacuum annealing at 400-600 °C, has been proposed to remove this hydride induced by wire-EDM. In addition, The wire-EDM induced microcracks extensively happen on the EDM-cut surface and penetrate into matrix up to 10-30 μm.

AB - Wire electric discharge machining (Wire-EDM) induced a new phase in Ti-46Al-2Cr (in at.%) intermetallic alloy has been identified by using X-ray diffraction technique. The new phase is found to be neither TiO2 nor Al2O3, but well consistent with fcc structure titanium hydride with the lattice parameter of 4.49-4.50 Å. The new phase exists in the wire-EDM cut alloy surface layer limiting to about 70 μm thick, much deeper than the wire-EDM induced recast layer thickness of 2-3 μm. One processing, vacuum annealing at 400-600 °C, has been proposed to remove this hydride induced by wire-EDM. In addition, The wire-EDM induced microcracks extensively happen on the EDM-cut surface and penetrate into matrix up to 10-30 μm.

KW - A. Titanium aluminides, based on TiAl

KW - C. Electric discharge machining

KW - F. X-ray diffraction

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DO - 10.1016/S0966-9795(03)00102-X

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VL - 11

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EP - 910

JO - Intermetallics

JF - Intermetallics

IS - 9

ER -

Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy

Abstract

Keywords

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