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초미세 결정립 이상 조직강의 가공경화거동

Title
초미세 결정립 이상 조직강의 가공경화거동
Other Titles
Mechanical Behavior ; Strain Hardening Behavior of Ultrafine Grained Dual-Phase Steel
Author
신동혁
Keywords
Equal-channel angular pressing; Ultrafine grain; Dual-phase steel; Strain hardening behavior
Issue Date
2006-05
Publisher
대한금속재료학회
Citation
대한금속재료학회지, v. 44, No. 5, Page. 301-307
Abstract
Strain hardening behavior of ultrafine grained (UFG) dual-phase (DP) steels via equal-channel angular pressing and subsequent intercritical annealing followed by water quenching was investigated at ambient temperature. The formation of UFG martensite islands of ~1㎛ was not confined to the prior pearlite colonies, but uniformly distributed throughout UFG ferrite matrix. Their room temperature tensile properties were examined and compared to those of coarse grained DP steels. Although uniform and total elongations were not degraded, the strengths of UFG-DP steels were much higher than that of coarse grained DP steels. In contrast to conventional UFG steels fabricated by equal-channel angular pressings, UFG-DP steels exhibited significant strain hardening rate, which was attributed to uniform distribution of island-typed martensite as well as grain refinement of each constituent phase throughout the microstructure. Such strain hardening behavior was discussed in relation to modified C-J analysis based on Swift relationship.
URI
http://kiss.kstudy.com/thesis/thesis-view.asp?key=2546505https://repository.hanyang.ac.kr/handle/20.500.11754/107926
ISSN
1738-8228; 2288-8241
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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