Effect of Post Weld Heat Treatment on Mechanical and Corrosion Behaviors of NiTi and Stainless Steel Laser-Welded Wires

Mirshekari, Gholamreza; Saatchi, A.; Kermanpur, A.; Sadrnezhaad, S.K.

doi:10.1007/s11665-016-2034-3

Cited by 18 publications

(2 citation statements)

References 23 publications

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“…NiTi monophase is, however, both flexible and rigid depending on the temperature. Superelasticity, biocompatibility, shock damping, fatigue restraint, restricted erosion, biofunctionality, wear opposition, corrosion resistance, shape memory, and stiffness similarity to the bone are some extraordinary behaviors of the Ni-Ti alloy [9,18,[24][25][26][27][28][29][30][31][32][33][34][35]. That these characteristics make it superior to other alloys qualifies Nitinol usage for making orthopaedic implants, especially for high loading/reloading regions.…”

Section: Nitinolmentioning

confidence: 99%

Nitinol Spinal Vertebrae: A Favorable New Substitute

Sadrnezhaad

Parsafar

Rashtiani

et al. 2019

IJE

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A B S T R A C TScoliosis, kyphosis, and bone fracture are health problems, especially of the elderly throughout the world. The vertebra protects the spinal cord. Any impairment to the vertebra can lead to pain and nervousness. Ni-Ti alloy (Nitinol) helps to resolve the problem by fulfilling such requirements as for strength, durability, resistance to wear, and shockwave damping which is due to the shape memory effect. Nitinol medical applications have so far been restricted to surgical devices and orthopaedics. Little has been said about Nitinol use for medication of the spinal vertebra disorder. This article appraises the potential features of Nitinol for vertebral implantation and therapeutic prescription consistent with the specific anatomical variation. Staples, screws, cages, stents, and posterior-stabilizers made of Nitinol have passed in-vitro tests and in some cases in-vivo examinations. Using anatomically tailored Nitinol for treatment and administration of the damaged vertebra is proposed as a forecastable dream.

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Section: Nitinolmentioning

confidence: 99%

Nitinol Spinal Vertebrae: A Favorable New Substitute

Sadrnezhaad

Parsafar

Rashtiani

et al. 2019

IJE

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“…Laser welding of alloys provides many advantages over conventional techniques such as great precision, super speed, great flexibility, high quality and low distortion [12][13][14][15][16][17][18][19][20]. Majumdar et al [9] have concluded that obtaining Al contents below 20 atom% in the Al-Ti mixing zone and crack free weld via the combination of any process parameters during Carbon Dioxide (CO 2 ) laser welding of Ti-6Al-4V and AlMg0.9Si is impossible.…”

mentioning

confidence: 99%

Pulsed Nd: YAG Laser Dissimilar Welding of Ti/Al3105 Alloys

et al. 2019

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Overlapped strips of titanium grade 2 and aluminum 3105-O alloy were welded together by an innovative spot-like pulse laser procedure. The tactile seam tracking on ring paths yielded reliable weld fit-up of 1 and 0.5 mm thickness strips. Since the welding parameters of Ti-Al were narrow, three welding speeds of 4, 5 and 6.67 mm·s -1 were chosen for the pretest conditions. The microstructural investigations showed that intermetallic compound Ti 3 Al, formed in Ti-rich fusion zone. Cracks formed in the Al-rich fusion zone as a result of TiAl 3 precipitation. Dimple fracture occurred at 6.67 mm·s -1 welding speed. Longer mixing time at Ti-Al interface occurred at lower welding speeds of 4 and 5 mm·s -1 , which led to the formation of thicker intermetallic compounds and more massive crack generation. It also increases the hardness of the fusion zone and results in brittle fracture type during the tensile test. The highest strength was achieved with a welding speed of 4 mm·s -1 which was a result of more massive weld nugget and lower porosity.

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