글로버메뉴 바로가기 본문 바로가기 하단메뉴 바로가기

논문검색은 역시 페이퍼서치

> 대한금속재료학회(구 대한금속학회) > 대한금속재료학회지 > 49권 6호

ECAP 가공에 의해 제조된 초미세립 OFHC Cu 봉재의 미세조직 및 기계적 특성의 균질성

Homogeneity of Microstructure and Mechanical Properties of Ultrafine Grained OFHC Cu Bars Processed by ECAP

지정훈 ( Jung Hoon Ji ) , 박이주 ( Lee Ju Park ) , 김형원 ( Hyung Won Kim ) , 황시우 ( Si Woo Hwang ) , 이종수 ( Chong Soo Lee ) , 박경태 ( Kyung Tae Park )

- 발행기관 : 대한금속재료학회(구 대한금속학회)

- 발행년도 : 2011

- 간행물 : 대한금속재료학회지, 49권 6호

- 페이지 : pp.474-487 ( 총 14 페이지 )


학술발표대회집, 워크숍 자료집 중 1,2 페이지 논문은 ‘요약’만 제공되는 경우가 있으니,

구매 전에 간행물명, 페이지 수 확인 부탁 드립니다.

무료
논문제목
초록(외국어)
Bars of OFHC Cu with the diameter of 45 mm were processed by equal channel angular pressing up to 16 passes via route B(c), and homogeneity of their microstructures and mechanical properties was examined at every four passes which develop the equiaxed ultrafine grains. In general, overall hardness, yield strength and tensile strength increased by 3, 7, and 2 times respectively compared with those of unECAPed sample. Cross-sectional hardness exhibited a concentric distribution. Hardness was the highest at the center of bar and it decreased gradually from center to surface. After 16 passes, overall hardness decreased due to recovery and partial recrystallization. Regardless of the number of passage, yield strength and tensile strength were quite uniform at all positions, but elongation showed some degree of scattering. At 4 passes, coarse and ultrafine grains coexisted at all positions. After 4 passes, uniform equiaxed ultrafine grains were obtained at the center, while uniform elongated ultrafine grains were manifested at the upper half position. At the lower half position, grains were equiaxed but its size were inhomogeneous. It was found that inhomogeneity of grain morphology and grain size distribution at different positions are to be attributed to scattering in elongation but they did not affect strength. The present results reveal the high potential of practical application of equal channel angular pressing on fabrication of large-sized ultrafine grained bars with quite homogeneous mechanical properties.

논문정보
  • - 주제 : 공학분야 > 금속공학
  • - 발행기관 : 대한금속재료학회(구 대한금속학회)
  • - 간행물 : 대한금속재료학회지, 49권 6호
  • - 발행년도 : 2011
  • - 페이지 : pp.474-487 ( 총 14 페이지 )
  • - ECN :
  • - UCI : I410-ECN-0102-2012-360-002306338
저널정보
  • - 주제 : 공학분야 > 금속공학
  • - 성격 : 학술지
  • - 간기 : 월간
  • - 국내 등재 : KCI 등재
  • - 해외 등재 : SCI / SCOPUS
  • - ISSN : 1738-8228
  • - 수록범위 : 1963–2018
  • - 수록 논문수 : 6551