Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys
This work presents a consolidated view of the autocatalysis, thermal and entropic effects in martensitic transformation of polycrystalline Fe-31wt%Ni-0.02wt%C, which has been a standard material for the investigation of fundamental aspects of the martensite transformation. The present work is based...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2017-08-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601548&tlng=en |
| _version_ | 1798021369369198592 |
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| author | José Roberto Costa Guimarães Paulo Rangel Rios |
| author_facet | José Roberto Costa Guimarães Paulo Rangel Rios |
| author_sort | José Roberto Costa Guimarães |
| collection | DOAJ |
| description | This work presents a consolidated view of the autocatalysis, thermal and entropic effects in martensitic transformation of polycrystalline Fe-31wt%Ni-0.02wt%C, which has been a standard material for the investigation of fundamental aspects of the martensite transformation. The present work is based on the description of classical microstructure descriptors of the transformation and on generally accepted concepts regarding the martensitic transformation in iron base alloys. Present work agrees with the view that the autocatalysis is a means by which the martensite transformation promotes further nucleation and growth. Autocatalysis induces the nucleation and growth of secondary plates in addition to the relatively small number of primary nucleation sites and their corresponding primary plates. We demonstrate that autocatalysis can be factored out into intragrain and intergrain components. The analysis of these factors establishes that intragrain autocatalysis is athermal but intergrain autocatalysis possess an Arrhenius temperature dependence. The reasons for such a behavior are discussed in detail. |
| first_indexed | 2024-04-11T17:12:10Z |
| format | Article |
| id | doaj.art-8bcd29a897e74b7a8aff4673325f3f26 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-11T17:12:10Z |
| publishDate | 2017-08-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-8bcd29a897e74b7a8aff4673325f3f262022-12-22T04:12:52ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392017-08-012061548155310.1590/1980-5373-mr-2016-0880Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloysJosé Roberto Costa GuimarãesPaulo Rangel RiosThis work presents a consolidated view of the autocatalysis, thermal and entropic effects in martensitic transformation of polycrystalline Fe-31wt%Ni-0.02wt%C, which has been a standard material for the investigation of fundamental aspects of the martensite transformation. The present work is based on the description of classical microstructure descriptors of the transformation and on generally accepted concepts regarding the martensitic transformation in iron base alloys. Present work agrees with the view that the autocatalysis is a means by which the martensite transformation promotes further nucleation and growth. Autocatalysis induces the nucleation and growth of secondary plates in addition to the relatively small number of primary nucleation sites and their corresponding primary plates. We demonstrate that autocatalysis can be factored out into intragrain and intergrain components. The analysis of these factors establishes that intragrain autocatalysis is athermal but intergrain autocatalysis possess an Arrhenius temperature dependence. The reasons for such a behavior are discussed in detail.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601548&tlng=enmetals and alloysmicrostructuremartensite transformationiron-nickel alloysautocatalysis |
| spellingShingle | José Roberto Costa Guimarães Paulo Rangel Rios Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys Materials Research metals and alloys microstructure martensite transformation iron-nickel alloys autocatalysis |
| title | Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys |
| title_full | Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys |
| title_fullStr | Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys |
| title_full_unstemmed | Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys |
| title_short | Martensite Transformation Intergrain and Intragrain Autocatalysis in Fe-Ni alloys |
| title_sort | martensite transformation intergrain and intragrain autocatalysis in fe ni alloys |
| topic | metals and alloys microstructure martensite transformation iron-nickel alloys autocatalysis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000601548&tlng=en |
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