Yanguang Cao, Tenghao Zhang, Ke Zhang, Xibin Fu, Xiaofeng Zhang, Zhaodong Li, Xi Zhang, Qilong Yong
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引用次数: 0
Abstract
This study examines the impact of short aging treatment on FeMnAlC low-density steel. The intragranular κ carbides exhibit an increase in size and undergo a morphological transformation from nanosphere to lamellar as the short aging temperature rises from 500 ℃ to 900 ℃. The volume fraction peaks at 600 ℃, and at 700 ℃, intergranular κ carbides, accompanied by α-phase precipitation, infiltrate the austenite matrix. Upon surpassing the κ carbide dissolution threshold, further increases in aging temperature result in its dissolution into the matrix. The Rockwell hardness attains a maximum of 38.5 HRC at 700 ℃. The low-temperature impact toughness decreases initially from 31 J at 500 ℃ to below 5 J, then rises to 17.5 J at 900 ℃. This increase is attributed to the presence of excessive intergranular κ carbides, which induce brittle fracture.
期刊介绍：
Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.
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