Influence of process variables on the characteristics of friction‐stir‐welded polyamide 6,6 joints

Influence of process variables on the characteristics of friction‐stir‐welded polyamide 6,6 joints

This paper aims to study the feasibility of friction stir welding of thermoplastic material polyamide 6,6. The maximum joint strength achieved through the optimized process variables is 41 MPa. The maximum temperature rise of 126 °C is achieved and the weld nugget exhibits a hardness of 69 D on Shor...

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Bibliographic Details
Published in:Materialwissenschaft und Werkstofftechnik Vol. 50; no. 9; pp. 1139 - 1148
Main Authors: Nandhini, R., Moorthy, M. Kesava, Muthukumaran, S., Kumaran, S.
Format: Journal Article
Language:English
Published: Weinheim Wiley Subscription Services, Inc 01-09-2019
Subjects:
Feasibility studies
Fibrillation
fractography
Fraktographie
Friction stir welding
Functional groups
Glass transition temperature
Glasübergangstemperatur
Hardness
Härte
Mathematical analysis
Plastic flow
Polyamid 6,6
polyamide 6,6
Polyamide resins
Process variables
Temperature
Thermoplast
Thermoplastic
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Summary:This paper aims to study the feasibility of friction stir welding of thermoplastic material polyamide 6,6. The maximum joint strength achieved through the optimized process variables is 41 MPa. The maximum temperature rise of 126 °C is achieved and the weld nugget exhibits a hardness of 69 D on Shore hardness scale. Fractography analysis reveals that the fracture followed a continuous plastic flow comprising less prominent fibrillation and more elongated voids. An increase in glass transition temperature Tg is observed in the weld specimen. The impact of the welding process variables on the frequency and band shift of the functional groups of the polymer is also discussed.
ISSN:0933-5137
1521-4052
DOI:10.1002/mawe.201800119