Experimental Investigation on Microstructure and Mechanical Properties of Laser-Welded Nb-1% Zr-0.1% C Alloy

Gupta, Syamasri; Jaypuria, Sanjib; Pratihar, Dilip Kumar; Saha, Partha

doi:10.1007/s11665-021-05979-8

Cited by 7 publications

(4 citation statements)

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“…The tensile strength of the weld joints was found to be 281 MPa, which is almost half of the base metal. Gupta et al [ 6 ] investigated the microstructure and mechanical properties of the laser‐welded joint of NbZr1 with the addition of 0.1 wt% C. The welded samples with larger laser power and welding speed exhibited better strength and ductility.…”

Section: Related Workmentioning

confidence: 99%

“…Refractory niobium (Nb) and its alloys are promising candidates in high‐temperature applications since they have demonstrated high ductility, [ 4 ] high corrosion resistance, [ 5 ] moderate strength, and favorable creep strength. [ 6 ] Nb is the lightest refractory metal with good thermal conductivity, and owing to its body‐centered cubic (BCC) structure, it has a high solubility of alloying elements. Zirconium (Zr) provides solid‐solution strengthening to the Nb matrix, increasing high‐temperature strength while maintaining ductility.…”

Section: Introductionmentioning

confidence: 99%

“…These unique properties make NbZr1 attractive for potential applications in nuclear power systems as fuel cladding, structural components, chemical, and aerospace industries. [ 6 ]…”

Section: Introductionmentioning

confidence: 99%

“…These unique properties make NbZr1 attractive for potential applications in nuclear power systems as fuel cladding, structural components, chemical, and aerospace industries. [6] Due to high melting temperatures and poor oxidation resistance, traditional melting and casting methods are inefficient for the fabrication of refractory metals. Vacuum arc melting furnaces are required to melt Nb and its alloys.…”

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Investigations of Microstructure and Mechanical Properties in Wire + Arc Additively Manufactured Niobium–Zirconium Alloy

et al. 2023

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Herein, the feasibility of the gas tungsten arc welding‐based wire + arc additive manufacturing process for fabricating thin wall structures of niobium‐1 wt% zirconium (NbZr1) alloy is investigated. Three different heat input conditions (low, medium, and high) have been selected for fabricating it. The microstructure is characterized by using optical microscopy, scanning electron microscopy, X‐ray diffraction, energy‐dispersive spectroscopy, and electron backscattered diffraction (EBSD). The microstructure shows the columnar dendritic structure elongated in the build direction. No cracks or porosity are observed in the structure. Average Vickers hardness for low, medium, and high heat input conditions are 146.6, 162.1, and 163.5 HV, respectively. There is an increasing trend of microhardness value along the deposition height, which can be attributed to the difference in secondary dendritic arm spacing and the formation of precipitates. The tensile strength of the specimen is comparable to the conventional and additively manufactured structures. EBSD analysis confirms that possible subgrains are responsible for good mechanical properties at room temperature. In the majority of the tensile samples, the failure mechanism has been identified as a ductile fracture. The mechanical characteristics fluctuate with locations in each of the thin walls, suggesting anisotropy in the deposits.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…These unique properties make NbZr1 attractive for potential applications in nuclear power systems as fuel cladding, structural components, chemical, and aerospace industries. [ 6 ]…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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