Effect of Tools Geometry and Dwell Time on Mechanical Properties and Macrograph of Two-Stage Refilled Friction Stir Spot Micro WeldArio Sunar Baskoro, Mohammad Azwar Amat and Muhammad Andre WidiyantoMATEC Web Conf., 269 (2019) 02002DOI: https://doi.org/10.1051/matecconf/201926902002