School of Materials and Energy;
Southwest University;
Chongqing;
400715;
China;
College of Architecture and Environment;
Sichuan University;
Chengdu;
610065;
China;
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection;
Chengdu University of Technology;
Chengdu;
610059;
China;
NC NiTi alloy; Void volume fraction; Fracture behavior; Grain size effect; Molecular dynamics modeling;