Formation and evolution of Al/steel interface structure in composite casting

• Published in: China foundry Vol. 21; no. 6; pp. 651 - 658
• Main Authors: Cao, Lei, Wang, Yu, Zang, Xi-min, Li, Yang, Wang, Guo-cheng, Xiao, Yuan-you
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.11.2024; Foundry Journal Agency; School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China%State Key Laboratory of Advanced Casting Technologies,Shenyang 110027,China%School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 111003,China%School of Metallurgy,Northeastern University,Shenyang 110819,China%School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China; Key Laboratory of Metallurgy Engineering Liaoning Province,University of Science and Technology Liaoning,Anshan 114051,China
• Subjects: Activation energy; Engineering; Founding; Intermetallic compounds; Machines; Manufacturing; Materials Engineering; Mechanical properties; Metallic Materials; Processes; Research & Development; China; A; intermetallic compounds; morphology; liquid-solid composite casting; TG146.21; structure
• ISSN: 1672-6421; 2365-9459
• DOI: 10.1007/s41230-024-3077-y

Al/steel composite materials were prepared using liquid-solid composite casting method, with aluminum as the liquid and 45 steel rods as the solid. The key factors affecting the formation and evolution of intermetallic compounds at the Al/steel reaction interface were studied. Results show that the defects present in the intermetallic compounds prepared at a liquid temperature of 900 °C and a holding time of 20 s are the least. The average hardness of Fe 2 Al 5 phase is 3 times higher than that of 45 steel and more than 7 times higher than that of pure aluminum. The average shear strength of the sample obtained through air cooling is higher than that of water cooling, and Fe 2 Al 5 phase is the main reason for the brittle fracture of the sample. The activation energy calculation of intermetallic compounds reveals that Fe 2 Al 5 is easy to grow up than FeAl 3 phase under air cooling conditions, and FeAl 3 is easy to grow up than Fe 2 Al 5 phase under water cooling conditions. This work offers assistance in studying the formation of intermetallic compounds during composite casting processes.