Hi, I want to know the peak temperature attained and temperature distribution with time in a frictional welding process ( ultrasonic consolidation between an Al substrate and Al strip). The problem with normal thermocouples is that by the time it shows the temperature , the temperature has been decayed to much lower value. I think I can have two approaches: 1) To look for a thermocouple having very low response time (in microseconds)and to directly obtain the time distribution of temperature. (I cannot use non contact sensors because sonitrode blocks the welded surface)Also if you can suggest me the manufacturer of such thermocouples. 2) From the temperature profiles obtained from simple thermocouple only, using a mathematical theory of heat transfer,and getting the peak temperature ( reverse problem) Please give me suggestions, specially for the second case.