Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels
Material degradation of thermomechanically strained reactor coolant piping made of austenitic stainless steels is accompanied by the strain-induced martensitic transformation of the metastable austenite to varying extents. Besides the accumulated plastic strain, the volume fraction of the α′ martens...
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| Veröffentlicht in: | Materials characterization 2007-10, Vol.58 (10), p.1006-1015 |
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| creator | Leber, Hans J. Niffenegger, Markus Tirbonod, Bernard |
| description | Material degradation of thermomechanically strained reactor coolant piping made of austenitic stainless steels is accompanied by the strain-induced martensitic transformation of the metastable austenite to varying extents. Besides the accumulated plastic strain, the volume fraction of the
α′ martensite also depends on the chemical composition, processing and final heat treatment or cold work condition of the individual heat. The objective of our study was to investigate the microstructural changes in isothermally low cycle fatigued specimens made out of industrially processed tube and pipe steels and tested in air. The volume fractions of martensite, determined by optimized magnetic nondestructive test methods, were globally small but could be large in the vicinity of the crack tip where higher plastic strains are present. The martensite was found at the intersections of slip bands. It was shown that the Schaeffler diagram and M
d30 temperature provide only qualitative information for the susceptibility to the transformation. |
| doi_str_mv | 10.1016/j.matchar.2007.05.011 |
| format | Article |
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α′ martensite also depends on the chemical composition, processing and final heat treatment or cold work condition of the individual heat. The objective of our study was to investigate the microstructural changes in isothermally low cycle fatigued specimens made out of industrially processed tube and pipe steels and tested in air. The volume fractions of martensite, determined by optimized magnetic nondestructive test methods, were globally small but could be large in the vicinity of the crack tip where higher plastic strains are present. The martensite was found at the intersections of slip bands. It was shown that the Schaeffler diagram and M
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α′ martensite also depends on the chemical composition, processing and final heat treatment or cold work condition of the individual heat. The objective of our study was to investigate the microstructural changes in isothermally low cycle fatigued specimens made out of industrially processed tube and pipe steels and tested in air. The volume fractions of martensite, determined by optimized magnetic nondestructive test methods, were globally small but could be large in the vicinity of the crack tip where higher plastic strains are present. The martensite was found at the intersections of slip bands. It was shown that the Schaeffler diagram and M
d30 temperature provide only qualitative information for the susceptibility to the transformation.</description><subject>AUSTENITE</subject><subject>Austenitic stainless tube and pipe steels</subject><subject>AUSTENITIC STEELS</subject><subject>CHEMICAL COMPOSITION</subject><subject>CRACKS</subject><subject>DIAGRAMS</subject><subject>FATIGUE</subject><subject>HEAT</subject><subject>HEAT TREATMENTS</subject><subject>Low cycle fatigue</subject><subject>MARTENSITE</subject><subject>MATERIALS SCIENCE</subject><subject>MICROSTRUCTURE</subject><subject>NONDESTRUCTIVE TESTING</subject><subject>PHASE TRANSFORMATIONS</subject><subject>Strain-induced martensite</subject><subject>STRAINS</subject><subject>TUBES</subject><issn>1044-5803</issn><issn>1873-4189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFUE1LxDAQLaLguvoThIDn1kmTpu1JZPELVrwoHkM6nbpZuu2SpMr-e1PWu6cZhvcx7yXJNYeMA1e322xnAm6My3KAMoMiA85PkgWvSpFKXtWncQcp06ICcZ5ceL8FAFXxcpF8vlp0ow9uwjA50zPj94TBs7Fj_fjD8IA9sc4E-zVRy8zkAw02WGQ-GDv05D0LU0PMDC3b2z3FO1HvL5OzzvServ7mMvl4fHhfPafrt6eX1f06RSHKkEpopeyU6RrVySavKzQ15qYl1XQtVnXbmGb-NJd1UzdCqRqLSkgDiqMqciGWyc1RN2aw2qMNhBschyGG0DkHlXNVRFRxRM1ZvaNO753dGXfQHPTcod7qvw713KGGQscOI-_uyIuJ6NuSmx1oQGqtmw3a0f6j8AsbeH61</recordid><startdate>20071001</startdate><enddate>20071001</enddate><creator>Leber, Hans J.</creator><creator>Niffenegger, Markus</creator><creator>Tirbonod, Bernard</creator><general>Elsevier Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20071001</creationdate><title>Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels</title><author>Leber, Hans J. ; Niffenegger, Markus ; Tirbonod, Bernard</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c337t-40d44f6afb6f4b298ca9c2ade6bfdc89dbab0681249b9b3669c5834a061c65233</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>AUSTENITE</topic><topic>Austenitic stainless tube and pipe steels</topic><topic>AUSTENITIC STEELS</topic><topic>CHEMICAL COMPOSITION</topic><topic>CRACKS</topic><topic>DIAGRAMS</topic><topic>FATIGUE</topic><topic>HEAT</topic><topic>HEAT TREATMENTS</topic><topic>Low cycle fatigue</topic><topic>MARTENSITE</topic><topic>MATERIALS SCIENCE</topic><topic>MICROSTRUCTURE</topic><topic>NONDESTRUCTIVE TESTING</topic><topic>PHASE TRANSFORMATIONS</topic><topic>Strain-induced martensite</topic><topic>STRAINS</topic><topic>TUBES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Leber, Hans J.</creatorcontrib><creatorcontrib>Niffenegger, Markus</creatorcontrib><creatorcontrib>Tirbonod, Bernard</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Materials characterization</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Leber, Hans J.</au><au>Niffenegger, Markus</au><au>Tirbonod, Bernard</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels</atitle><jtitle>Materials characterization</jtitle><date>2007-10-01</date><risdate>2007</risdate><volume>58</volume><issue>10</issue><spage>1006</spage><epage>1015</epage><pages>1006-1015</pages><issn>1044-5803</issn><eissn>1873-4189</eissn><abstract>Material degradation of thermomechanically strained reactor coolant piping made of austenitic stainless steels is accompanied by the strain-induced martensitic transformation of the metastable austenite to varying extents. Besides the accumulated plastic strain, the volume fraction of the
α′ martensite also depends on the chemical composition, processing and final heat treatment or cold work condition of the individual heat. The objective of our study was to investigate the microstructural changes in isothermally low cycle fatigued specimens made out of industrially processed tube and pipe steels and tested in air. The volume fractions of martensite, determined by optimized magnetic nondestructive test methods, were globally small but could be large in the vicinity of the crack tip where higher plastic strains are present. The martensite was found at the intersections of slip bands. It was shown that the Schaeffler diagram and M
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| ispartof | Materials characterization, 2007-10, Vol.58 (10), p.1006-1015 |
| issn | 1044-5803 1873-4189 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | AUSTENITE Austenitic stainless tube and pipe steels AUSTENITIC STEELS CHEMICAL COMPOSITION CRACKS DIAGRAMS FATIGUE HEAT HEAT TREATMENTS Low cycle fatigue MARTENSITE MATERIALS SCIENCE MICROSTRUCTURE NONDESTRUCTIVE TESTING PHASE TRANSFORMATIONS Strain-induced martensite STRAINS TUBES |
| title | Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels |
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