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Iranian Journal of Materials Science and Engineering، جلد ۲۲، شماره ۱، صفحات ۶۲-۷۳
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عنوان انگلیسی Investigation of Mechanical Strength and Fatigue Crack Growth Behaviour of Hot-Rolled SUP9 Steel for Leaf Spring Suspension Application
چکیده انگلیسی مقاله The investigation of SUP9 steel under the hot-rolling conditions for applications to leaf spring suspension focused on its tensile and fatigue crack growth (FCG) properties. In order to investigate the tensile properties, tensile specimens were fabricated in the longitudinal-transverse (LT) direction. Furthermore, in order to evaluate fatigue crack growth (FCG) behaviour, compact tensile (CT) specimens with different crack plane orientations in both the LT and transverse-longitudinal (TL) directions were employed. Microstructural and fractographic analyses were conducted using optical microscope (OM) and scanning electron microscopy (SEM). The hot-rolling process reduced the interlamellar spacings of Fe3C, enhancing the tensile properties through strain hardening. A high yield-to-ultimate strength ratio (~0.623) indicates excellent plastic deformation capability and resistance to fatigue crack growth, making SUP9 steel suitable for the leaf spring suspension system. Furthermore, the exponential crack growth rate constant, m, was found to be 3.066 in the TL direction and 3.265 in the LT direction, indicating that cracks propagate more rapidly in the LT orientation. Additionally, non-metallic inclusions, such as spherical oxides and MnS precipitates in LT specimens, were observed to facilitate faster crack growth in the transverse direction.
 
کلیدواژه‌های انگلیسی مقاله SUP9 steel,Hot-rolling,Lamellar Fe3C,Manganese sulphide,Crack growth rate
نویسندگان مقاله | Mohammad Badaruddin
Department of Mechanical Engineering, Faculty of Engineering, Universitas Lampung


| Ahmad Kurniawan Purga
Study Program of Magister-Department of Mechanical Engineering, Faculty of Engineering, Universitas Lampung


| Dwi Asmi
Department of Physics, Faculty of Mathematics and Faculty of Mathematics and Natural Science, Universitas Lampung


| Sugiyanto Sugiyanto
Department of Mechanical Engineering, Faculty of Engineering, Universitas Lampung


| Slamet Sumardi
Research Unit for Mineral Technology, National Research and Innovation Agency (BRIN), Tanjung Bintang, Lampung Selatan-Indonesia


| Andreas Luki Indratmoko
Polytechnic of Tunas Garuda, Department of Manufactural Engineering, Lampung, Indonesia
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5472-1&slc_lang=en&sid=1
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Synthesis and preparation of materials to meet the requirements of AM techniques
نوع مقاله منتشر شده Research Paper
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