Spallation in NiTi under One-Dimensional Shock Loading

Journal Article · Fri Jul 28 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2263414· OSTI ID:20875755

Wallwork, A; Workman, A ^[1]; Meziere, Y J. E.; Millett, J C. F. ^[2]; Bourne, N K ^[3]

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1. AWE, Aldermaston, Reading, RG7 4PR. United Kingdom (United Kingdom)
2. Defence Academy of UK, Cranfield University, Shrivenham, Swindon, SN6 8LA (United Kingdom)
3. University of Manchester, Sackville Street, Manchester, M60 1QD (United Kingdom)

The dynamic response of the shape memory alloy NiTi has been of interest to a number of investigators because it displays a shape memory effect. The dynamic tensile (spall) strength of this material is measured under one-dimensional shock loading. The loading stress pulse length and impact stress were varied to a peak stress of 15 GPa. The pull back stress ({sigma}pbs) was found to increase with the applied pulse length. This suggests that the dynamic tensile strength is dependent upon the generation of a deformation micro structure that evolves behind the shock front. In contrast, increasing stress levels result in a near-constant pull back stress, although at the lowest applied stress, spallation did not occur.

• OSTI ID: 20875755
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 845; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEFORMATION
FRACTURES
LOADING
MICROSTRUCTURE
NICKEL ALLOYS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
PULSES
SHAPE MEMORY EFFECT
SHOCK WAVES
SPALLATION
STRESSES
TENSILE PROPERTIES
TITANIUM ALLOYS