This standard specifies the method for determining the phase transformation temperature of nickel-titanium shape memory alloys - the bending and free recovery method. This standard is applicable to the determination of the martensite reverse phase transformation temperature by measuring the recovery deformation during the thermal phase transformation process. It is applicable to the fully annealed state or heat treatment where the end temperature of the martensite reverse phase transformation A is between -25 ℃ ~ 90 ℃. wire, tube or strip.
YS/T 970-2014 Referenced Document
GB/T 6379 Precision of test methods--Determination of repeatability and reproducibility for a standard test method by interlaboratory tests
YS/T 970-2014 history
2014YS/T 970-2014 Phase change temperature measuring method for nickel-titanium shape memory alloys