Analysis of Recovery Characters in Fe-17Mn-5Si-10Cr-5Ni Alloy Pipe-joints

The recovery characters of pipe-joint made form Fe-17Mn- 5Si- 10Cr-5Ni shape memory alloy were studied systematically. The recovery ratio reduces with increasing per-strain and the maximal recovery strain appears when pre-strain is 4% ~ 6%. When pre-strain is 4.5% ~ 8%, the connecting of pipe-joint shows bigger tight force. The shape memory effect and tight force of the pipe-joint can improve remarkably with thermalmechanical training. The recovery ratio and recovery strain reduces with increasing thickness of pipe-joint. With a reasonable range in thickness of pipe-joint, the tight force in connecting of pipe-joint is higher. With increasing length of jointing, in the connecting of pipe-joint the tight force reduces.