Fig. 5From: Hydrogen embrittlement behavior of Ni-Ti shape memory alloy with different microstructures in acidic fluoride solutionSEM micrographs of typical side surfaces of a non-immersed specimen A and b magnified view of a, c specimen A immersed in 0.2 % APF solution for 2 h and d magnified view of c, e specimen A immersed in 0.2 % APF solution for 4 h and f magnified view of e, and g specimen A immersed in 0.2 % APF solution for 6 h and h magnified view of g Back to article page