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2020 Vol.30, Issue 4 Preview Page
Effect of Carbon and Nickel on Microstructure and Low Temperature Charpy Impact Properties of HSLA Steels

HSLA 강의 미세조직과 저온 샤르피 충격 특성에 미치는 탄소와 니켈의 영향

Haewon Eom1
,
Sung Kyu Cho2
,
Young Wook Cho2
,
Gunchul Shin3
,
Yongjai Kwon3
,
Jung Gu Lee3
,
Sang Yong Shin13†
엄 해원1
,
조 성규2
,
조 영욱2
,
신 건철3
,
권 용재3
,
이 정구3
,
신 상용13†
1Department of Convergence Technology for Heavy Industries, University of Ulsan, Ulsan 44610, Republic of Korea
2Technical Research Center, Hyundai Steel Company, Dangjin 31719, Republic of Korea
3School of Materials Science and Engineering, University of Ulsan, Ulsan 44610, Republic of Korea
1울산대학교 중공업융합기술공학과
2현대제철 R&D Center
3울산대학교 첨단소재공학부
†Corresponding author E-Mail : sshin@ulsan.ac.kr (S. Y. Shin, Univ. of Ulsan)
April 2020. pp. 184-196
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Abstract

In this study, effects of carbon and nickel on microstructure and low temperature Charpy impact properties of HSLA (high strength low alloy) steels are investigated. To understand the complex phase transformation behavior of HSLA steels with high strength and toughness before and after welding processes, three kinds of HSLA steels are fabricated by varying the carbon and nickel content. Microstructure analysis, low temperature Charpy impact test, and Vickers hardness test are performed for the base metals and CGHAZ (coarse-grain heat affected zone) specimens. The specimens with the lowest carbon and nickel content have the highest volume fraction of AF, the lowest volume fraction of GB, and the smallest GB packet size. So, the low temperature Charpy absorbed energy of the CGHAZ specimen is the highest. The specimens with increased carbon and nickel content have the lowest volume fraction of AF, the highest volume fraction of GB, and the largest GB packet size. So, the low temperature Charpy absorbed energy of the CGHAZ specimen is the lowest.

Keywords
HSLA steel
carbon
nickel
microstructure
charpy impact properties
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 30
  • No :4
  • Pages :184-196
  • Received Date : 2020-01-21
  • Revised Date : 2020-03-04
  • Accepted Date : 2020-03-26
  • DOI :https://doi.org/10.3740/MRSK.2020.30.4.184
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