%0 Journal Article
%T HYSTERESIS OF PHASE TRANSFORMATION TEMPERATURE IN NiTi SHAPE MEMORY ALLOY
%A QIN Guiying YU Xuejie JIN Heng WANG Jingcheng Shanghai Iron
%A Steel Research Institute
%A Shanghai
%A China
%A <br>QIN Guiying YU Xuejie JIN Heng WANG Jingcheng Shanghai Iron and Steel Research Institute
%A Shanghai
%A China
%J 金属学报(英文版)
%D 1992
%I 
%X The relationship between structure and hysteresis of phase transformation temperature in NiTi shape memory alloy has been investigated by means of TEM observation,positron an- nihilation and electrical resistivity measurement.The sequence of hysteresis for the alloy aged under different regimes was found to be:plate martensite>R-phase>tie-like martensite. The reversible displaeement of phase boundaries of these transformations is blocked by the co- herent stress field around Ti_(11)Ni_(14)phase particles.A linear relationship between S paramet- er of positron annihilation and maximum values of temperature hysteresis showed that the mismatch dislocation and elastic stress field established by Ti_(11)Ni_(14)phase precipitation are the main factor to determine the temperature hysteresis of phase transformation in NiTi shape memory alloy.
%K shape memory alloy
%K hysteresis of phase transformation temperature
%K coherent stress field
%K mismatch dislocation<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=5F86E935ABF81001FB78183521C3731D&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=E158A972A605785F&sid=FA89360EB995A8AD&eid=6CCE24D86D03D083&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=9