Processing of interpenetrating Mg–TiNi composites by spark plasma sintering

Review and perspectives: shape memory alloy composite systems

“…For instance, Dixit et al [112] manufactured NiTi particulate reinforced Al through friction stir processing and experimentally measured the residual stresses and strengths of composites. Although the friction stir processed composites did not exhibit significant Interpenetrating " [21] residual stresses, subsequent processing through cold-rolling and annealing did produce residual stresses which resulted in substantial improvements in the yield strengths. Recent efforts by Ni et al [319] have further developed this work for bulk processing by considering 5mm thick specimens.…”

“…When they e, the load carrying ly increases while the for the heat transfer re is hybridized with city of the composite all strain rates used due to improved heat transfer across wire/matrix interface. The elastomer matrix is responsible for faster heat transfer, resulting in decreasing the amplitude of the NiTi wires' temperature oscillations and earlier stabilizing of the mean wire temperature during mechanical cycling at a given cycling frequency [21]. The thermal le responses of (a) NiTiBare structure and (b) NiTi S solid composite.…”

“…The idea of strengthening metal matrices is also not restricted to aluminum systems. For instance, the utilization of NiTi as reinforcement has also been investigated for AlSi (33% shear strength increase with 3% NiTi fibers) [299] and Mg [300,461,127,21] matrix systems. With respect to the latter case, Esen [127] considered different reinforcement content and demonstrated that although NiTi content increases yield strength and elongation, those benefits decrease with increasing NiTi content.…”

“…With respect to the latter case, Esen [127] considered different reinforcement content and demonstrated that although NiTi content increases yield strength and elongation, those benefits decrease with increasing NiTi content. Aydogmus [21] similarly manufactured composites with different concentrations and determined the stress-strain response of these systems as a function of reinforcement content and temperature. From this study, it was observed that any NiTi reinforcement increases the strength and modulus of these materials and the apparent improvements actually grow with temperature up to 150 • C (Fig.…”

Toz Metalürjisi Yöntemi İle Üretilmiş Magnezyum Matrisli Kompozitlerin Korozyon Duyarlılıkları

“…Bu nedenle gerek magnezyum ve alaşımlarının gerekse de magnezyum esaslı kompozitlerin korozyon dayanımlarının iyileştirilmesi büyük önem arz etmektedir [11,12]. Literatürde magnezyum matrisli kompozitlerin düşük mekanik özellikleri saf bakır, nikel, titanyum, Ti6Al4V ve TiNi alaşımları ile iyileştirilmeye çalışılmış olmasına karşın bu takviye materyallerinin korozyon özellikleri üzerine etkisi hakkında bilgi oldukça sınırlıdır [13][14][15][16]. Ayrıca TiNi alaşımının saf magnezyumun korozyon dayanımı üzerindeki etkisinin araştırılması literatürde bir ilk olma özelliğine sahiptir.…”