DSCM在中温环境下SnSb8.5焊丝变形测量中的应用研究

研究了无铅中的一种SnSb8．5焊丝的力学性能，它是大变形材料并且在中温环境下进行应变测量，因此，普通引伸计不适用．在此，介绍了一种非接触式的应变测量方法——数字散斑相关法（DSCM）．DSCM有着全场、非接触、高精度和易操作方面的突出优点，将DSCM应用于中温环境中SnSb8．5无铅焊丝的应变测量．首先用实验验证了此方法的可行性，再将其应用于中温环境中SnSb8．5焊丝的力学性能测试，并成功得出了应力应变数据，为无铅材料的推广应用提供了理论依据．

Application study on deformation measurement in mid-temperature environment for SnSb8.5 welding wire using DSCM

The mechanical properties performance of SnSb8.5 welding wire which is a kind of Pb-free material has been studied.Because its deformation is big and is tested in mid-temperature environment,normal extensometer isn't suit to test it.For these,we discussed a method called Digital Speckle Correlation Method of non-contact strain measurement.DSCM has its own advantages of full-field,high-accuracy and easy-operate.We apply DSCM to strain test of SnSb8.5 Pb-free solder wire in mid-temperature environment.The method is proved to be reliable by experiment first.Then,we apply DSCM to testing mechanical property of SnSb8.5 solder wire in mid-temperature environment.Finally, we get the stress and strain data successfully that will offer theory basis for wide application of Pb-free material.