Interphase boundary structures of intragranular proeutectoid α plates in a hypoeutectoid TiCr alloy

T. Furuhara; J. M. Howe; H. I. Aaronson

doi:10.1016/0956-7151(91)90104-9

Interphase boundary structures of intragranular proeutectoid α plates in a hypoeutectoid TiCr alloy

T. Furuhara, J. M. Howe, H. I. Aaronson

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

65 Citations (Scopus)

Abstract

Interphase boundary structure on the board faces of proeutectoid α plates in a retained β matrix has been studied in a Ti-6.62at. %Cr alloy by means of conventional and high resolution transmission electron microscopy. Misfit compensating ledges with b = c/2[0001]_α are observed on the broad faces of α plates. Growth ledges, irregular in path, spacing and alignment, are also observed. The apparent habit plane of the broad faces of α plates and the riser directions of the misfit compensating ledges, determined by trace analysis, imply the presence of the structural ledges predicted in the companion modeling study. High-resolution TEM observation has revealed that biatomic structural ledges with (1100)_α//(211)_β terraces do indeed exist on the broad faces of α plates, with exactly the characteristics predicted. This result provides the first experimental evidence for structural ledges in any b.c.c.:h.c.p. system.

Original language	English
Pages (from-to)	2873-2886
Number of pages	14
Journal	Acta Metallurgica Et Materialia
Volume	39
Issue number	11
DOIs	https://doi.org/10.1016/0956-7151(91)90104-9
Publication status	Published - 1991 Nov
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)

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10.1016/0956-7151(91)90104-9

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title = "Interphase boundary structures of intragranular proeutectoid α plates in a hypoeutectoid TiCr alloy",

abstract = "Interphase boundary structure on the board faces of proeutectoid α plates in a retained β matrix has been studied in a Ti-6.62at. %Cr alloy by means of conventional and high resolution transmission electron microscopy. Misfit compensating ledges with b = c/2[0001]α are observed on the broad faces of α plates. Growth ledges, irregular in path, spacing and alignment, are also observed. The apparent habit plane of the broad faces of α plates and the riser directions of the misfit compensating ledges, determined by trace analysis, imply the presence of the structural ledges predicted in the companion modeling study. High-resolution TEM observation has revealed that biatomic structural ledges with (1100)α//(211)β terraces do indeed exist on the broad faces of α plates, with exactly the characteristics predicted. This result provides the first experimental evidence for structural ledges in any b.c.c.:h.c.p. system.",

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AU - Furuhara, T.

AU - Howe, J. M.

AU - Aaronson, H. I.

PY - 1991/11

Y1 - 1991/11

N2 - Interphase boundary structure on the board faces of proeutectoid α plates in a retained β matrix has been studied in a Ti-6.62at. %Cr alloy by means of conventional and high resolution transmission electron microscopy. Misfit compensating ledges with b = c/2[0001]α are observed on the broad faces of α plates. Growth ledges, irregular in path, spacing and alignment, are also observed. The apparent habit plane of the broad faces of α plates and the riser directions of the misfit compensating ledges, determined by trace analysis, imply the presence of the structural ledges predicted in the companion modeling study. High-resolution TEM observation has revealed that biatomic structural ledges with (1100)α//(211)β terraces do indeed exist on the broad faces of α plates, with exactly the characteristics predicted. This result provides the first experimental evidence for structural ledges in any b.c.c.:h.c.p. system.

AB - Interphase boundary structure on the board faces of proeutectoid α plates in a retained β matrix has been studied in a Ti-6.62at. %Cr alloy by means of conventional and high resolution transmission electron microscopy. Misfit compensating ledges with b = c/2[0001]α are observed on the broad faces of α plates. Growth ledges, irregular in path, spacing and alignment, are also observed. The apparent habit plane of the broad faces of α plates and the riser directions of the misfit compensating ledges, determined by trace analysis, imply the presence of the structural ledges predicted in the companion modeling study. High-resolution TEM observation has revealed that biatomic structural ledges with (1100)α//(211)β terraces do indeed exist on the broad faces of α plates, with exactly the characteristics predicted. This result provides the first experimental evidence for structural ledges in any b.c.c.:h.c.p. system.

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Interphase boundary structures of intragranular proeutectoid α plates in a hypoeutectoid TiCr alloy

Abstract

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