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Titolo:
Effect of thermal cycling on microstructures and mechanical properties of lath and lenticular martensites in Fe-Ni alloys
Autore:
Seo, SB; Leem, DS; Jun, JH; Choi, CS;
Indirizzi:
Yonsei Univ, Dept Engn Met, Seoul 120749, South Korea Yonsei Univ Seoul South Korea 120749 Engn Met, Seoul 120749, South Korea Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 t Mech & Ind Engn, Urbana, IL 61801 USA
Titolo Testata:
ISIJ INTERNATIONAL
fascicolo: 4, volume: 41, anno: 2001,
pagine: 350 - 355
SICI:
0915-1559(2001)41:4<350:EOTCOM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERGRANULAR FRACTURE; STEELS; SEGREGATION;
Keywords:
Fe-Ni alloy; repetition of transformation; thermal cycling; sulfur segregation; mechanical properties; martensite;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Seo, SB Yonsei Univ, Dept Engn Met, Seoul 120749, South Korea Yonsei UnivSeoul South Korea 120749 , Seoul 120749, South Korea
Citazione:
S.B. Seo et al., "Effect of thermal cycling on microstructures and mechanical properties of lath and lenticular martensites in Fe-Ni alloys", ISIJ INT, 41(4), 2001, pp. 350-355

Abstract

Effects of thermal cycling on the microstructures and mechanical properties of Fe-15% Ni and Fe-31 % Ni alloys having lath and lenticular martensite,respectively, have been studied. The average width of laths in lath martensite of Fe-15 % Ni alloy decreased with the increase in number of thermal cycles, and the width of internal twins in lenticular martensite of Fe-31 % Ni alloy also decreased with thermal cycling. The hardness of martensite increased up to 3 thermal cycles in Fe-31 % Ni alloy, over which it remained constant. On the other hand, the hardness of martensite in Fe-15 % Ni alloyincreased up to 1 cycle, and remained nearly constant on further cycles. The tensile strength of martensite in Fe-31 % Ni alloy increased up to 3 cycles, showing a similar tendency of the hardness variation. However, the tensile strength of martensite in Fe-15 % Ni alloy decreased with increasing the number of thermal cycles in spite of the increase in hardness with thermal cycling. The reason is that no strain hardening occurred in the thermal-cycled specimens owing to the brittle fracture due to the segregation of sulfur at prior austenite grain boundaries.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 00:52:04