Instability map for cold and warm working of as-cast 304 stainless steel
Identifieur interne : 002403 ( Main/Exploration ); précédent : 002402; suivant : 002404Instability map for cold and warm working of as-cast 304 stainless steel
Auteurs : S. Venugopal [Inde, États-Unis] ; S. L. Mannan [Inde] ; Y. V. R. K. Prasad [Inde]Source :
- Journal of Materials Processing Technology [ 0924-0136 ] ; 1995.
Abstract
The deformation characteristics of as-cast 304 stainless steel under compression in the temperature range 20–600 °C and strain rate range 0.001–100 s−1 have been studied with a view to characterizing the flow instabilities occurring in the microstructure. At strain rates of less than 0.05 s−1, as-cast 304 stainless steel exhibits flow localization in the temperature range 20–600 °C, whereas dynamic strain ageing occurs at intermediate temperatures and below 5 s−1. At room temperatures and strain rates of less than 0.05 s−1, martensite formation is observed. To avoid the above microstructural instabilities warm working should be carried out at strain rates greater than 10 s−1 in the temperature range 400–600 °C and cold working could be done in the range of about 0.05–0.8 s−1. The continuum criterion developed on the basis of the principles of maximum rate of entropy production and separability of the dissipation function, predicts accurately all of the above instability features.
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DOI: 10.1016/0924-0136(95)02249-X
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Venugopal</name><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Materials Development Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603 102, Taml Nadu</wicri:regionArea><wicri:noRegion>Taml Nadu</wicri:noRegion></affiliation><affiliation wicri:level="2"><country xml:lang="fr" wicri:curation="lc">États-Unis</country><wicri:regionArea>1 Presently as NRC Associate with Materials Process Design, Materials Directorate, Wright Laboratory, Wright Patterson Air Force Base, OH 45433-7746</wicri:regionArea><placeName><region type="state">Ohio</region></placeName></affiliation></author><author><name sortKey="Mannan, S L" sort="Mannan, S L" uniqKey="Mannan S" first="S. L." last="Mannan">S. L. 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At strain rates of less than 0.05 s−1, as-cast 304 stainless steel exhibits flow localization in the temperature range 20–600 °C, whereas dynamic strain ageing occurs at intermediate temperatures and below 5 s−1. At room temperatures and strain rates of less than 0.05 s−1, martensite formation is observed. To avoid the above microstructural instabilities warm working should be carried out at strain rates greater than 10 s−1 in the temperature range 400–600 °C and cold working could be done in the range of about 0.05–0.8 s−1. The continuum criterion developed on the basis of the principles of maximum rate of entropy production and separability of the dissipation function, predicts accurately all of the above instability features.</div></front></TEI><affiliations><list><country><li>Inde</li><li>États-Unis</li></country><region><li>Ohio</li></region></list><tree><country name="Inde"><noRegion><name sortKey="Venugopal, S" sort="Venugopal, S" uniqKey="Venugopal S" first="S." last="Venugopal">S. Venugopal</name></noRegion><name sortKey="Mannan, S L" sort="Mannan, S L" uniqKey="Mannan S" first="S. L." last="Mannan">S. L. Mannan</name><name sortKey="Prasad, Y V R K" sort="Prasad, Y V R K" uniqKey="Prasad Y" first="Y. V. R. K." last="Prasad">Y. V. R. K. Prasad</name></country><country name="États-Unis"><region name="Ohio"><name sortKey="Venugopal, S" sort="Venugopal, S" uniqKey="Venugopal S" first="S." last="Venugopal">S. Venugopal</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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