document: Experimental investigations on monitoring and control of induction heating process for semi-solid alloys using the heating coil as sensor A method of monitoring the state of metal alloys during induction heating and control of the heating process utilizing the heating coil itself as a sensor is proposed , and its usefulness and effectiveness were experimentally investigated using aluminium A357 billets for the semi-solid metal -LRB- SSM -RRB- casting processes . The impedance of the coil containing the billet was continuously measured by the proposed method in the temperature range between room temperature and 700 degrees C . It was found that the reactance component of the impedance varied distinctively according to the billet state and could clearly monitor the deformation of the billet , while the resistance component increased with temperature , reflecting the variation of the resistivity of the billet which has strong correlation to the solid/liquid fraction of the billets . The measured impedance is very sensitive to the billet states such as temperature , deformation and solid/liquid fraction and could be used as a parameter to monitor and control the heating process for SSMs
doc_bio_tags: O O O O O O O B I I O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O B I O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: induction heating process semisolid alloys reactance component billet state resistance component
abstractive_keyphrases: process monitoring process control semisolid metal casting heating coil sensor coil impedance billet deformation resistivity variation solid/liquid fraction solenoid coil 20 to 700 c