The γ→ε→α′ Martensitic Transformations in an Fe–Mn–C Alloy
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- Shimizu Ken’ichi
- Institute of Scientific and Industrial Research, Osaka University
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- Tanaka Yasuji
- Graduate School, Osaka University
書誌事項
- タイトル別名
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- The γ→ε→α′ Martensitic Transformations in an Fe–Mn–C Alloy
抄録
Close-packed hexagonal ε and body-centered cubic (or tetragonal) α′ martensites in an Fe-12.0%Mn-0.48%C (wt %) alloy have been examined by optical and electron microscopy and electron and X-ray diffractions. The α′ martensites are clearly shown to form in ε martensite bands via the γ→ε→α′ transformation process, having six variants of orientations in one ε martensite. They make three pairs by two variants which contact to each other forming a junction plane. Two surface trace analysis shows that the junction plane is parallel to a {1\bar100}ε (or {11\bar2}γ) plane which is perpendicular to the (0001)ε (or (111)γ) habit plane of the related ε martensite bands, and that habit planes of the paired two α′ martensites deviate from the {1\bar100}ε junction plane in opposite ways by about 7°. Both the habit planes and crystallographic axes of the paired two martensites are twin-related to each other martensite with respect to the {2\bar11}α′ twin plane and also to the junction plane. (011)[01\bar1]α′ planar defects are found by electron microscopy in α′ martensites. The twin-related habit planes and crystallographic axes of paired two α′ martensites are well explained by a phenomenological calculation for the ε to α′ transformation using the (0001)[1\bar100]ε (or (011)[01\bar1]α′) lattice invariant shear observed by electron microscopy and the lattice parameters determined by X-ray diffraction.
収録刊行物
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- Transactions of the Japan Institute of Metals
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Transactions of the Japan Institute of Metals 19 (12), 685-693, 1978
社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001205117786880
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- NII論文ID
- 130003485627
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- COI
- 1:CAS:528:DyaE1MXht1GgtL4%3D
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- ISSN
- 24324701
- 00214434
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可