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Crystallography and morphology of a lathy ferrite in Fe-Cr-Ni alloys during directional solidification
J. W. Fu; Y. S. Yang
2013
Source PublicationJournal of Materials Research
ISSN0884-2914
Volume28Issue:15Pages:2040-2046
AbstractThe relationship between morphology and crystallography of an entangled lathy ferrite during directional solidification in Fe-Cr-Ni alloy has been investigated. During solidification, morphology of the lathy ferrite depends on the orientation relationship between the lathy ferrite and austenite. When the plane in the austenite substrate is (1 $(1) over bar $1)(gamma), "Y-shaped" lathy ferrite grows in an entangled cluster and the orientation relationship between the lathy ferrite and austenite is the Nishiyama-Wassermann relationship. Lathy ferrite is preferentially elongated along < 211 >(gamma) and < 011 >(gamma) directions on (1 $(1) over bar $1)(gamma) plane due to lower misfit. The included angle among the "Y-shaped" lathy ferrite is about 120 degrees because the angle between each pair of [21 $$(1) over bar](gamma), [(1) over bar 12](gamma), and [(1) over bar(2) over bar(1) over bar](gamma) crystal directions is equal to 120 degrees. Formation mechanism of the perpendicular lathy ferrite has also been analyzed according to the relationship between < 211 >(gamma) and < 011 >(gamma) on (1 $(1) over bar $1)(gamma) plane. This indicates that required crystal morphology of the lathy ferrite in the solidified microstructure can be obtained by controlling the crystal plane of austenite.
description.department[fu, junwei ; yang, yuansheng] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; fu, jw (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; hitfujw@163.com
KeywordAustenitic Stainless-steel Aisi 304-stainless-steel Widmanstatten Cementite Delta-ferrite Martensite Evolution Phase Welds Microstructure Dissolution
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71217
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. W. Fu,Y. S. Yang. Crystallography and morphology of a lathy ferrite in Fe-Cr-Ni alloys during directional solidification[J]. Journal of Materials Research,2013,28(15):2040-2046.
APA J. W. Fu,&Y. S. Yang.(2013).Crystallography and morphology of a lathy ferrite in Fe-Cr-Ni alloys during directional solidification.Journal of Materials Research,28(15),2040-2046.
MLA J. W. Fu,et al."Crystallography and morphology of a lathy ferrite in Fe-Cr-Ni alloys during directional solidification".Journal of Materials Research 28.15(2013):2040-2046.
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