Microscopic analysis of the morphology of seams in friction stir welded polypropylene

Supermolecular structure of welded seams prepared by friction stir welding (FSW) of polypropylene sheets has been studied by optical and electron microscopy. It has been shown that in the central parts of the seam spherulitic struc- tures similar to that of the base material are formed, while at the borderline of the seam, a complex supermolecular structure could be identified. Lower welding rotation speed resulted in a border transition zone of more complex feature than the higher rotation speed during FSW. This was accompanied by reduced joint efficiency.

[1]  W. M. Thomas,et al.  Friction Stir Butt Welding , 1991 .

[2]  A. Armagan Arici,et al.  Friction Stir Spot Welding of Polypropylene , 2008 .

[3]  Tibor Czigány,et al.  Applicability of friction stir welding in polymeric materials , 2007 .

[4]  D. Bassett,et al.  An improved permanganic etchant for polyolefines , 1982 .

[5]  Seth R. Strand,et al.  Effects of Friction Stir Welding on Polymer Microstructure , 2004 .

[6]  Rajiv S. Mishra,et al.  Friction Stir Welding and Processing , 2007 .

[7]  Mahfoudh Ayadi,et al.  Application of Taguchi approach to optimize friction stir welding parameters of polyethylene , 2010 .

[8]  M. Aydın,et al.  Effects of Welding Parameters and Pre-Heating on the Friction Stir Welding of UHMW-Polyethylene , 2010 .

[9]  J. Varga.  Supermolecular structure of isotactic polypropylene , 1992, Journal of Materials Science.

[10]  Interrelationships between welding parameters of hot-gas welded polypropylene , 2006 .

[11]  H. Yıldırım,et al.  Effects of welding procedures on mechanical and morphological properties of hot gas butt welded PE, PP, and PVC sheets , 2008 .

[12]  A. Armagan Arici,et al.  Effects of double passes of the tool on friction stir welding of polyethylene , 2005 .

[13]  Yufeng Sun,et al.  Investigation of the welding parameter dependent microstructure and mechanical properties of friction stir welded pure copper , 2010 .

[14]  G. Ehrenstein,et al.  Vibration welding of alpha and beta isotactic polypropylenes: Mechanical properties and structure , 2008 .

[15]  P. H. Foss,et al.  Thermoplastic vibration welding: Review of process phenomenology and processing–structure–property interrelationships , 2011 .

[16]  Yufeng Sun,et al.  Investigation of welding parameter dependent microstructure and mechanical properties in friction stir welded pure Ti joints , 2010 .

[17]  Ahmet İrfan Yükler,et al.  The optimization of welding parameters for friction stir spot welding of high density polyethylene sheets , 2011 .

[18]  C. Hamilton,et al.  A model of material flow during friction stir welding , 2008 .

[19]  J. Karger‐Kocsis,et al.  Effect of skin-core morphology on fatigue crack propagation in injection moulded polypropylene homopolymer , 1989 .

[20]  R. Fonda,et al.  Development of grain structure during friction stir welding , 2004 .

[21]  R. Miranda,et al.  Process Developments and Materials Characterization in FSW/P , 2022 .

[22]  P. Asadi,et al.  Friction stir welding/processing of polymeric materials , 2014 .