High-strength low-alloy steel is one of the widely used materials in onshore and offshore plant engineering. We investigated the alloying effect of solute atoms in α-Fe based alloy using ab initio calculations. Empirical equations were used to establish the effect of alloying on the Vicker’s hardness, screw energy coefficient, and edge dislocation energy coefficient of the steel. Screw and edge energy coefficients were improved by the addition of V and Cr solute atoms. In addition, the addition of trace quantities of V, Cr, and Mn enhanced abrasion resistance. Solute atoms and contents with excellent mechanical properties were selected and their thermal conductivity and thermal expansion behavior were investigated. The addition of Cr atom is expected to form alloys with low thermal conductivity and thermal expansion coefficient. This study provides a better understanding of the state-of-the-art research in low-alloy steel and can be used to guide researchers to explore and develop α-Fe based alloys with improved properties, that can be fabricated in smart and cost-effective manners.

1. 서 론
2. 계산 방법
3. 결과 및 고찰
4. 결 론
Acknowledgement

• 김명재(숭실대학교 신소재공학과) | Myungjae Kim (Department of Materials Science and Engineering, Soongsil University, Seoul 06978, Republic of Korea)
• 곽종욱(숭실대학교 신소재공학과) | Jongwook Kwak (Department of Materials Science and Engineering, Soongsil University, Seoul 06978, Republic of Korea)
• 김지웅(숭실대학교 신소재공학과, 숭실대학교 친환경화학소재융합학과) | Jiwoong Kim (Department of Materials Science and Engineering, Soongsil University, Seoul 06978, Republic of Korea, Department of Green Chemistry and Materials Engineering, Soongsil University, Seoul 06978, Republic of Korea) Corresponding author
• 김경남(강원대학교 신소재공학과) | Kyung-Nam Kim (Department of Advanced Materials Engineering, Kangwon National University, Samcheok 25913, Republic of Korea) Corresponding author