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Investigations on Dissimilar Weld of UNS S32205 DSS and ASTM A517 Steel

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Abstract

In the present research, microstructure and mechanical properties of 2205 duplex stainless steel/A517 quench and tempered low alloy steel dissimilar joint were investigated. For this purpose, gas tungsten arc welding was used with ER2209 filler metal. Characterizations were conducted by optical microscopy, scanning electron microscopy equipped with an energy dispersive spectroscopy and X-ray diffraction. Mechanical properties were evaluated in micro-hardness, tensile and impact tests. Microstructure in the weld zone included an austenitic continuous network in the matrix of primary ferrite. No brittle phases were formed in the weld metal and stainless steel heat affected zone (HAZ). The weld metal/A517 interface showed higher hardness than other regions. Tensile tests indicated that the values of the yield and tensile strength were 663 and 796 MPa, respectively. Impact tests indicated that the weld zone had almost the same impact energy as base metals. The minimum impact energy of 12 J was related to A517 HAZ. The results of scanning electron microscopy for fracture surfaces indicated that weld zone, 2205 HAZ and A517 HAZ had ductile, ductile–brittle and brittle fracture mode, respectively.

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Authors and Affiliations

  1. Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, 85141-43131, Iran

    A. Foroughi & M. Kasiri-Asgarani

  2. Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran

    M. Shamanian & J. Kangazian

Authors
  1. A. Foroughi
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  2. M. Shamanian
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  3. M. Kasiri-Asgarani
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  4. J. Kangazian
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Correspondence to A. Foroughi.

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Foroughi, A., Shamanian, M., Kasiri-Asgarani, M. et al. Investigations on Dissimilar Weld of UNS S32205 DSS and ASTM A517 Steel. Trans Indian Inst Met 71, 533–544 (2018). https://doi.org/10.1007/s12666-017-1186-7

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  • DOI: https://doi.org/10.1007/s12666-017-1186-7

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