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Abstract

This study is to find the extent of variation in mechanical properties between plate and pipe welds fabricated out of the same FSW process parameters. Common thickness of 3 mm along with similar tool specifications is used to fabricate the weld. Process parameters of tool rotational speed 2000 rpm and weld speed 94 mm/min that was defined as optimal for pipe weld is used as common process parameters. Welds are analyzed for hardness and tensile properties. Yield strength and ultimate tensile strength varied about 8.1% and 11.2% respectively between plate and pipe welds. The hardness of the stir zones varied about 11.6% between plate and pipe welds.
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Authors and Affiliations

S.M. Senthil
1
ORCID: ORCID
S. Ragu Nathan
2
R. Parameshwaran
1
ORCID: ORCID
M. Bhuvanesh Kumar
3

  1. Kongu Engineering College, Erode, India
  2. Sree Vidyan Ikethan Engineering College, Tirupati, India
  3. National Institute of Technology, Tiruchirappalli, India
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Abstract

The electrical contactors play a crucial role in closing the circuit in many power distribution components like overhead lines, underground cables, circuit breakers, transformers, and control systems. The failure in these components mainly occurs due to the break-down of contactors due to the continuous opening and closing action of contacts. Silver (Ag)-based oxide contact materials are widely used in practice, among which silver tin oxide (AgSnO2) is most common. An attempt is made in increasing the performance of AgSnO2, by adding Tungsten Oxide (WO3) in various weight proportions, thus finding the optimal proportion of AgSnO2WO3 to have increased mechanical and electrical performances. All the composite samples are fabricated in-house using powder metallurgy process. The assessment of physical and electrical properties namely, density, hardness, porosity, and electrical conductivity, showed that 90%Ag-8.5%SnO2-1.5%WO3 composite yielded superior results. With help of morphological tests, wear characteristics are also investigated, which showed that 90%Ag-8.5%SnO2-1.5%WO3 composite has a wear coefficient of 0.000227 and a coefficient of friction of 0.174 at an optimized load of 10 N and sliding velocity of 0.5 mm/s.
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Authors and Affiliations

S. Praveen Kumar
1
ORCID: ORCID
S.M. Senthil
1
ORCID: ORCID
R. Parameshwaran
1
ORCID: ORCID
R. Rathanasamy
1
ORCID: ORCID

  1. Kongu Engineering College, Erode, Tamilnadu, India

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