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Başlık: Effect of the microstructure on the notched tensile strength of as-cast and austempered ductile cast irons
Yazarlar: Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.
0000-0002-7286-3433
Durmuş, Ali
Aydın, Hakan
Tutar, Mumin
Bayram, Ali
Yiğit, Kurtuluş
J-2753-2016
55964532400
16312009400
54406234300
7004197848
56490995600
Anahtar kelimeler: Engineering
Ductile cast irons
Austempering
Mechanical properties
Notch sensitivity
Fracture toughness
Fractography
Fracture-toughness
K-iscc
High-silicon
Threshold
Behavior
Fatigue
Ductility
Ferrite
Fractography
Fracture mechanics
Hardness
Microstructure
Pearlite
Stainless steel
Tensile strength
As-cast
Austempered ductile cast irons
Austempered ductile irons
Cylindrical specimens
High-tensile strength
Notch root radius
Notch tensile strength
Notch-root
Notched tensile strength
Toughness properties
Cast iron
Yayın Tarihi: 2012
Yayıncı: Sage Publications
Atıf: Durmuş, A. vd. (2012). "Effect of the microstructure on the notched tensile strength of as-cast and austempered ductile cast irons". Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Science, 226(C9), 2214-2229.
Özet: In this study, the effect of microstructure on the mechanical properties of four types of ductile cast irons with different morphologies was investigated using circumferentially notched cylindrical specimens with different notch root radii. These cast irons were also austempered using the same austempering heat treatment to make a comparison with the as-cast samples. Characterization of the specimens has been carried out by means of microstructure, hardness, tensile properties, notch tensile strength, notch sensitivity, fracture toughness, and fractography. A mixture of ferrite and pearlite in the microstructure of cast irons gives rise to a material of the highest tensile strength, notch tensile strength, and fracture toughness properties with the intermediate ductility and notch sensitivity. A higher pearlite in the matrix of cast irons gives very important mechanical properties such as hardness and strength, but brittleness of the matrix and notch sensitivity are greatly increased. Austempering significantly increased the mechanical properties and also reduced the difference between the mechanical properties of the cast irons. Austempered ferritic ductile irons exhibited the highest notch tensile strength and fracture toughness, and the high tensile strength and the intermediate ductility properties with the lowest notch sensitivity, whereas austempered pearlitic ductile irons had the lowest tensile strength, ductility, notch tensile strength, fracture toughness, and the intermediate notch sensitivity properties. The mechanical properties of the as-cast and austempered ductile irons have increased almost linearly with increase in the notch root radius.
URI: https://doi.org/10.1177/0954406211433248
https://journals.sagepub.com/doi/10.1177/0954406211433248
http://hdl.handle.net/11452/24223
ISSN: 0954-4062
2041-2983
Koleksiyonlarda Görünür:Scopus
Web of Science

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