Stress relaxation behavior of columnar-grained Cu–Al–Mn shape memory alloys

Huang, Haiyou; Yao, Pei-Sheng; Su, Yanjing

doi:10.1016/j.msea.2019.138432

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…The history of this noble alloy material started in 1963, where William Buehler and his coworkers discovered its behaviors of shape recovery capability [40]. Following this, the NINOL was given to the material in which NI standing for nickel and NOL attributing it to the Naval Ordinance Laboratory, where the behavior was first discovered [41]. The material produced a strange loud sound in a cold stage, which is different from that at the hot stage [38].…”

Section: Phase Transformation In Smamentioning

confidence: 99%

A review on Nitinol shape memory alloy heat engines

Abubakar

Wang

2020

Smart Mater. Struct.

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Nitinol (NiTi) shape memory alloy (SMA) heat engine is a very promising candidate application of SMA since its invention, but yet to be put as commercial due to its low efficiency and performance. In this paper, a review of different types of NiTi SMA heat engine is presented. The review is done based on the following headings: conceptual design, constitutive driving model, the performance of the engine, and engine limitations. Factors like temperature, cooling rate, size of NiTi SMA element, and the stretch ratio of NiTi SMA spring were identified as determinants of final output power and efficiency of SMA heat engines. It is found that a crankshaft NiTi SMA heat engine produced the highest power output value of 4 watt, an unsynchronized pulley NiTi SMA heat engine with 11.3% of engine efficiency has the highest engine performance so far recorded. Some engine's drawbacks like an improper driving model, drag loss, backsliding were identified as the major problem affecting the engine performance, and which, if solved, will increase the overall performance and efficiency for future development toward its commercialization.

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Section: Phase Transformation In Smamentioning

confidence: 99%