Journal ArticleDOI
Effect of Post Weld Heat Treatment on Mechanical and Corrosion Behaviors of NiTi and Stainless Steel Laser-Welded Wires
TLDR
In this paper, the effects of post weld heat treatment (PWHT) on mechanical properties and corrosion behavior of NiTi shape memory wire, laser welded to the 304 stainless steel wire were investigated.Abstract:
Effects of post weld heat treatment (PWHT) on mechanical properties and corrosion behavior of NiTi shape memory wire, laser welded to the 304 stainless steel wire were investigated. The results showed that PWHT at 200 °C increased corrosion resistance and tensile strength of the joint up to ~1.8 times that of the as-weld joint, with no heat treatment. On the contrary, precipitation of neoteric intermetallic compounds like Fe2Ti, Cr2Ti, FeNi, Ni3Ti, and Ti2Ni in the welded region deteriorated these properties, when PWHT was conducted at 400 °C. Due to the vital effects of the PWHT performed after the laser welding, careful control of the PWHT temperature was found to be a prerequisite for achievement of desirable properties in the dissimilar NiTi-304 stainless steel laser-welded wires.read more
Citations
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Journal ArticleDOI
Effects of post-weld heat treatment on the microstructure and mechanical properties of laser-welded NiTi/304SS joint with Ni filler
TL;DR: In this article, post-weld heat treatment (PWHT) at 650°C and 850°C were applied on a defect-free NiTi/Ni/SS joint to improve its mechanical properties.
Journal ArticleDOI
Effects of support particle size and Pt content on catalytic activity and durability of Pt/TiO2 catalyst for oxygen reduction reaction in proton exchange membrane fuel cells environment
G.R. Mirshekari,Cynthia A. Rice +1 more
TL;DR: In this article, the authors investigated the effect of the size and content of TiO2 support particle size on the oxygen reduction reaction (ORR) activity and stability of the Pt/TiO2 catalyst in the absence of corrosive carbon.
Journal ArticleDOI
Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding
TL;DR: The fracture mechanisms of different joints are strongly dependent on the types of interlayers, and the joints without interlayer, adding Ni interlayer and adding FeNi interlayer exhibit cleavage fracture, intergranular fracture and mixed fracture composed of cleavage and tearing ridge, respectively as discussed by the authors.
Journal ArticleDOI
The effect of annealing temperature on microstructure and mechanical properties of dissimilar laser welded superelastic NiTi to austenitic stainless steels orthodontic archwires
TL;DR: Results show that post-weld annealing is an effective process on improving mechanical properties of dissimilar joints of these two alloys, however, a suitable heat-treatment temperature is needed in order to achieve desired results.
References
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