The production of dense NiTi alloy parts by powder metallurgy (PM) generally requires pressure-enhanced sintering techniques. Warm compaction of NiTi alloys from powder mixture is promising because, with the use of both moderate pressure (600 MPa) and temperature (250 °C) during compaction, the particles readily deform resulting in a well-bonded compact of green densities up to 85 % of the theoretical density. The obtained compacts can then be sintered at high-temperature using a new vapor phase calciothermic reduction (VPCR) process developed in our laboratory, which allows single-phase NiTi parts to be obtained. In this study, NiTi shape-memory alloys of high chemical homogeneity and low porosity (about 8 %) were obtained, opening new perspectives for the production of near-net-shape NiTi alloys from elemental powder mixture. Furthermore, the produced NiTi shape-memory alloys show large recovery strains under low applied stresses
