Microscopic shape memory and superelastic effects under complex loading conditions

Ni, Wangyang; Cheng, Yang‐Tse; Grummon, David S.

doi:10.1016/s0257-8972(03)00920-4

Cited by 70 publications

(59 citation statements)

References 16 publications

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Section: Resultssupporting

confidence: 88%

“…These recovery ratios are similar to the values reported for a pseudoelastic NiTi alloy subjected to Berkovich indentations [10], which are also in the range of 0.4e0.5. No significant differences were appreciated for h h obtained at various loads, as is expected for Berkovich indentations [10]. The obtained values of h h in a pure elasticeplastic material like Cu are around 0.08 [10], remarkably lower than that obtained in pseudoelastic materials.…”

Section: Resultssupporting

confidence: 88%

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Instrumented indentation of transforming and no-transforming phases in Cu–Al–Be shape-memory alloys

2012

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 88%

Instrumented indentation of transforming and no-transforming phases in Cu–Al–Be shape-memory alloys

2012

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“…Ni et al [15,16] carried out indentation experiments on nickel titanium shape memory alloys, using Berkovich and spherical diamond tips. The recovery ratio for spherical indentations was reported to be larger than those from sharp Berkovich tips for any given strain rate.…”

Section: Resultsmentioning

confidence: 99%

Design and construction of a micro-indenter for tribological investigations

Tan

Hassel

Stratmann

2005

Mat.-wiss. u. Werkstofftech.

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Characterisation of erosion contact conditions remains a challenge due to the chaotic morphology of eroded surfaces. The present work presents details on the design and construction of a low load micro-indenter to investigate the initial stages of particle impact. Spherical ZrO 2 particles and angular SiC particles have been fitted onto stainless steel indenter tips to simulate contact between eroding particles on an aluminium surface. Contact loads between 50 and 1800 mN were utilised to elucidate the effects of load and indentation depth. Indented craters were subsequently imaged by the scanning electron microscope (SEM), revealing its particle dependent morphology. Crater area and depths from both types of particles were also quantified and subsequently correlated to the indentation load. It was demonstrated that contact pressure generated by angular particles are 1.5 times higher than those from spherical particles, resulting in greater plastic deformation and larger crater area at high loads. The work carried out during indentations were also calculated, it was shown that indentation experiments can be utilised for simulating dynamic erosion experiments under a large velocity range.

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“…Thus, some researchers use instrumented micro and nano-indentation equipment to simulate the effect of particle on shape memory alloy surface during erosion process and investigate relationship between surface mechanical behavior of shape memory alloy and its erosion resistance. [10][11][12][13] The results show that the pseudoelasticity can improve the mechanical behavior of shape memory alloy surface against particle impingement and thereby reduce erosion damage. However, the mechanical behavior of surface modified shape memory alloy has been reported little in the literature, and the static localized loading exerted by indentation equipment does not simulate properly the dynamic impact loading experienced by materials during erosion process.…”

Section: Introductionmentioning

confidence: 99%

Influence of Carburization on Dynamic Impact Behavior of NiTiCu Alloy

Cui

Zheng

2006

Mater. Trans.

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The dynamic impact behavior of bare and carburized NiTiCu shape memory alloy was studied using a home-built impact testing system in this paper. The contact force and contact time between impactor and specimen at different impact energy were measured in real time by force sensor, and predicted formulae about parameters during impact process were presented. The results showed that the contact force and contact time of carburized specimens were less than these of bare specimens, and the absorbed energy of carburized specimens due to stress-induced martensitic transformation was higher than that of bare specimens. These results indicated that the carburization process could reduce contact force and material damage of NiTiCu alloy during impact process.

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Microscopic shape memory and superelastic effects under complex loading conditions

Cited by 70 publications

References 16 publications

Instrumented indentation of transforming and no-transforming phases in Cu–Al–Be shape-memory alloys

Instrumented indentation of transforming and no-transforming phases in Cu–Al–Be shape-memory alloys

Design and construction of a micro-indenter for tribological investigations

Influence of Carburization on Dynamic Impact Behavior of NiTiCu Alloy

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