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Effect of alloying elements on weld metal mechanical properties in shielded metal Arc welded API-X 80 steel

Sheykh Jaberi, F ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. Microstructure and mechanical properties development of X80 weld metal by addition of different amounts of alloying elements such as Nickel and Manganese to the covering of electrodes were investigated. For this reason samples were welded with electrodes that Ni value changed between 0.8%- 3.5% in tow critical amounts of Mn: 0.7 and 1.6. Tensile test and microhardness results indicated the suitable ranges of Ni and Mn for acceptable mechanical properties. In addition, optical microscopy and scanning electron microscopy were applied to link the microstructure with mechanical properties. The hardness of weld metals were found to increase linearly with Mn and Ni, which was attributed mainly to solid solution strengthening and partly to formation of hard phases
  5. Keywords:
  6. Toughness ; Welding ; Critical amount ; Hard phasis ; Microstructure and mechanical properties ; Shielded metals ; Solid solution strengthening ; Tensile tests ; Weld metal ; X80 ; X80 steel ; Alloying ; Alloying elements ; Electric welding ; Industrial applications ; Manganese ; Metals ; Microstructure ; Optical microscopy ; Scanning electron microscopy ; Tensile testing ; Welding electrodes ; Welds ; Mechanical properties
  7. Source: AIST Steel Properties and Applications Conference Proceedings - Combined with MS and T'10, Materials Science and Technology 2010, 17 October 2010 through 21 October 2010 ; October , 2010 , Pages 781-789 ; 9781935117131 (ISBN)