7xxx계급 알루미늄 열간 압출재의 평가를 위한 미세조직과 응력-변형률 곡선의 분석 (Charactetristical Analysis of the Microstructure and the Stress-Strain Curves for the Evaluation of 7xxx Series Aluminum Extrudates)

서지정보

· 발행기관 : 한국열처리공학회
· 수록지 정보 : 열처리공학회지 / 31권 / 6호 / 307 ~ 314페이지
· 저자명 : 이상용, 우영호

초록

Simple tensile tests and microstructural investigations have been performed on extrudates of high strength aluminum alloys such as 7075, 7021 and 7xxx(Sc) to understand correlation between extruding conditions and extruded properties. Tensile specimens which were taken from different locations at the same cross section of an extrudate were tested at room temperature and with a strain rate of 8.9 × 10−5/s. The microstructures according to the locations at the cross section have been observed using optical microscopy and electron backscattered diffraction (EBSD) mapping to characterize the effect on stress-strain curve. The results could be classified in three types independent of alloying contents and extusion methods. The fine differences in the stressstrain curves were resulted from inhomogenity in the microstructures according to locations of an extrudate which were performed through instantaneous extruding conditions such as temperature, strain rate and strain.

영어초록

Simple tensile tests and microstructural investigations have been performed on extrudates of high strength aluminum alloys such as 7075, 7021 and 7xxx(Sc) to understand correlation between extruding conditions and extruded properties. Tensile specimens which were taken from different locations at the same cross section of an extrudate were tested at room temperature and with a strain rate of 8.9 × 10−5/s. The microstructures according to the locations at the cross section have been observed using optical microscopy and electron backscattered diffraction (EBSD) mapping to characterize the effect on stress-strain curve. The results could be classified in three types independent of alloying contents and extusion methods. The fine differences in the stressstrain curves were resulted from inhomogenity in the microstructures according to locations of an extrudate which were performed through instantaneous extruding conditions such as temperature, strain rate and strain.

참고자료

· 없음