Stationary Shoulder Friction Stir Processing: A Low Heat Input Grain Refinement Technique for Magnesium Alloy
Stationary shoulder friction stir processing (SSFSP) as a low heat input grain refinement technique is projected in this study. SSFSP can be considered as a variant of friction stir processing (FSP) with modified tooling system. It uses stationary shoulder tool and rotating probe, which helps to reduce heat input in great manner during process. Present work aims to refine grain size in thick AZ31B magnesium alloy using SSFSP without using external cooling at different tool rotational speeds (700–1300 rpm). The smooth surface with little flash without any defect was obtained in all the samples, which had confirmed the wide processing range of SSFSP. Probe-dominated stir zone (SZ) achieved for all rotational speeds, which confirmed smaller temperature gradient throughout the SZ thickness. SZ produced at the lowest rotational speed (700 rpm) exhibited reduction in grain size and subsequently enhancement in mechanical properties (hardness and tensile).
KeywordsGrain refinement Friction stir processing Magnesium Stationary shoulder
The authors would like to thank for the financial support from the National Key Research and Development Program of China (2016YFB1100104). We also want to acknowledge the editorial committee, organizer(s) of Friction Stir Welding and Processing X, and TMS for recognizing our research work.
- 2.Komarasamy M, Mishra RS, Baumann JA, Grant G, Hovanski Y (2013) Processing, microstructure and mechanical property correlation in Al-B4C surface composite produced via friction stir processing. In: Friction stir welding and processing VII. Springer, pp 39–46Google Scholar
- 4.Patel VV, Li WY, Vairis A, Badheka VJ (2018) Recent development in friction stir processing as a solid-state grain refinement technique: microstructural evolution and property enhancement. Crit Rev Solid State Mater Sci (In Press)Google Scholar
- 11.Yang K, Li WY, Niu PL, Yang XW, Xu YX (2018) Cold sprayed AA2024/Al2O3 metal matrix composites improved by friction stir processing: microstructure characterization, mechanical performance and strengthening mechanisms. J Alloy Compd 736:115–123. https://doi.org/10.1016/j.jallcom.2017.11.132CrossRefGoogle Scholar