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Upset resistance welding of carbon steel to austenitic stainless steel narrow rods

Ozlati, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s11665-016-2321-z
  3. Publisher: Springer New York LLC
  4. Abstract:
  5. Effects of welding current (at the range of 2-4 kA) on the microstructure and mechanical properties of upset resistance welds of AISI-1035 carbon steel to AISI-304L austenitic stainless steel rods were investigated. The results showed that the joint strength first increased by raising the welding current up to 3 kA and then decreased beyond it. Increasing trend was related to more plastic deformation, accelerated diffusion, reduction of defects and formation of mechanical locks at the joint interface. For currents more than 3 kA, decrease in the joint strength was mainly caused by formation of hot spots. Using the optimum welding current of 3 kA, tensile strength of the joint reached to ~76% of the carbon steel base metal strength. Microstructural observations and microhardness results confirmed that there was no hard phase, i.e., martensite or bainite, at the weld zone. Moreover, a fully austenitic transition layer related to carbon diffusion from carbon steel was observed at the weld interface
  6. Keywords:
  7. Upset resistance welding ; Austenitic stainless steel ; Carbon steel ; Electric welding ; Mechanical properties ; Microstructure ; Resistance welding ; Tensile strength ; Welding ; Welding rods ; Welds ; Austenitic ; Carbon diffusion ; Joint interfaces ; Joint strength ; Micro-structural observations ; Microstructure and mechanical properties ; Transition layers ; Welding current ; Stainless steel
  8. Source: Journal of Materials Engineering and Performance ; Volume 25, Issue 11 , 2016 , Pages 4902-4910 ; 10599495 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s11665-016-2321-z