Authors: J R Nataraj M Krishna H N Narasimha Murthy C S Prasad V T Bhanukiran S C Sharma
Publish Date: 2013/03/14
Volume: 44, Issue: 7, Pages: 3271-3280
Abstract
The synthesis of two Crfree nickelbased alloys designated as 1S with 65 pct Mn and 2H without Mn of compositions varying between 40 to 435Ni 20Mo 22 to 25Fe 10Cu 65 to 0Mn 1Ti and 05Al wt pct as filler materials for TIG welding application was performed New filler materials were developed to reduce carcinogenic hexavalent chromium Cr6+ fumes generated during the welding of 300 series austenitic stainless steel The Crfree nickel alloys were characterized for microstructure and mechanical properties The developed alloys showed good microstructure stability in ascast and solutiontreated conditions A material properties simulation software JMatPro predicted that 2H alloy has 2 wt pct more γ solid solution phase than in 1S but has 22 wt pct less γ′ strengthening precipitates phase than in 1S alloy The tensile strength of 1S alloy was about 22 pct more than 2H The solution treatment of both alloys decreased the hardness tensile and yield strengths by about 21 pct but ductility improved by about 17 pct Fracture studies of both alloys showed the ductile mode of failure
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