Fatigue strength optimization of compacted graphite cast iron processed by austempering process

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-03-29 DOI:10.1016/j.msea.2025.148271

X.Y. Teng , B.Z. Tan , J.C. Pang , Y. Chen , C.L. Zou , F. Shi , S.X. Li , Z.F. Zhang

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引用次数: 0

Abstract

The fatigue property optimization of compacted graphite cast iron (CGI) by the austempering process was investigated. The austenitizing at 850 °C firstly then austempering at 280 °C and 370 °C respectively were selected. The tensile and fatigue properties and corresponding damage mechanism of the CGI and austempered CGI (ACGI) samples were carried out. The highest fatigue strength of 221 MPa for CGI materials was obtained by austempering at 370 °C. The fatigue strength decreases first and then increases in CGI and ACGI samples with the increase of austempering temperature. The general relation between the tensile and fatigue strength of CGI was further investigated. The corresponding physical significance in the relations was proposed based on the different defect morphologies in cast iron alloys, which provides implications for understanding the relation between metal fatigue and tensile strength and optimizing fatigue properties.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.