Investigation of TIG Cladding of NiTi Wire on Substrate 304L to Study the Effect of Applied Current on Microstructure and Mechanical Properties
| Autor: | Akhilesh Kumar Singh, Amar Nath Sinha, Muthuvel Murugan, A. Saravanan, Piyush Kumar Pathak, Pramod Kumar, Chetan Kumar Hirwani |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Cladding (metalworking) Materials science Gas tungsten arc welding Abrasive 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology engineering.material Tungsten Microstructure 01 natural sciences chemistry Nickel titanium 0103 physical sciences engineering Austenitic stainless steel Composite material Layer (electronics) 021102 mining & metallurgy |
| Zdroj: | Transactions of the Indian Institute of Metals. 74:1333-1348 |
| ISSN: | 0975-1645 0972-2815 |
| DOI: | 10.1007/s12666-021-02213-w |
| Popis: | NiTi wire of 1 mm diameter was deposited on austenitic stainless steel (304L) for surface property modification using the tungsten inert gas (TIG) cladding process. The study shows that the microstructure and mechanical properties of the NiTi cladding are governed by TIG process parameters, namely TIG current. The micro-hardness of the NiTi clad region has improved 4.7 times compared to the substrate material 304L. The wear resistance of the clad layer against the abrasive disc (Al2O3) shows up to 6 times improvement than the substrate material austenitic stainless steel 304L. The presence of Ti-rich (Ni,Fe)Ti, NiTiFeCr and intermetallics, responsible for high hardness and high wear resistance, has been observed in the clad surface, which have been confirmed by the XRD and EDS analysis. The optical and FESEM micrographs of the clad, intermediate and substrate metals have been analysed, and the influence of TIG current on microstructure and mechanical properties has been investigated. With the improved significant results, NiTi clad specimens can be used as a cutting and grinding tool for industrial applications. |
| Databáze: | OpenAIRE |
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