SALSA—A new instrument for strain imaging in engineering materials and components

Pirling, Thilo; Bruno, Giovanni; Withers, Philip J.

doi:10.1016/j.msea.2006.04.083

Cited by 143 publications

(90 citation statements)

References 12 publications

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“…The residual stresses were determined from lattice strains measured on the SALSA neuron diffractometer at the ILL, Grenoble, France [13]. Lattice strain was measured using the (311) reflection since it has been reported that it does not accumulate large intergranular stresses and is recommended for FCC materials by the standard for neutron scattering ISO/TTA 3:2001.…”

Section: Residual Stress Studiesmentioning

confidence: 99%

Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments

et al. 2010

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Four mechanical surface treatments have been considered for the application to austenitic stainless steel structures. Shot peening (SP), laser shock peening (LSP), ultrasonic impact treatment (UIT) and water jet cavitation peening (WJCP), also known as cavitation shotless peening (CSP), have been applied to 8 mm thick Type 304 austenitic stainless steel coupons. This study considers the merits of each of these mechanical surface treatments in terms of their effect on the surface roughness, microstructure, level of plastic work and through thickness residual stress distribution. Microstructural studies have revealed the formation of martensite close to the treated surface for each process. Residual stress measurements in the samples show compressive stresses to a significantly greater depth for the LSP, UIT and WJCP samples compared to the more conventional SP treated sample.

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Section: Residual Stress Studiesmentioning

confidence: 99%

Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments

et al. 2010

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“…The neutron strain scanning method is well developed particularly for steel as the most important engineering material. Dedicated strain scanning diffractometers exist at most of large scale neutron facilities, for example diffractometer SALSA at ILL Grenoble [13], ENGIN-X at ISIS in UK [14], SMARTS at LANSCE [15], TAKUMI at J-Parc in Japan [16] or VULCAN at SNS in USA [17].…”

Section: Neutron Strain Scanning Methodsmentioning

confidence: 99%

“…The strain scanning experiments were performed on the high resolution two-axis neutron stress/strain diffractometer SALSA at ILL Grenoble [13]. The diffractometer uses a six-axis robotic Stewart platform -hexapod to mount, move and rotate the sample with respect to the neutron beam.…”

Section: Neutron Strain Scanning Experimentsmentioning

confidence: 99%

Internal stresses in steel plate generated by shape memory alloy inserts

et al. 2012

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Neutron strain scanning was employed to investigate the internal stress fields in steel plate coupons with embedded prestrained superelastic NiTi shape memory alloy inserts. Strain fields in steel were evaluated at T=21°C and 130 °C on virgin coupons as well as on mechanically and thermally fatigued coupons. Internal stress fields were evaluated by direct calculation of principal stress components from the experimentally measured lattice strains as well as by employing inverse FE modelling approach. It is shown that if the NiTi inserts are embedded into the elastic steel matrix following a carefully designed technological procedure, the internal stress fields vary with temperature in a reproducible and predictable way. It is estimated that this mechanism of internal stress generation can be safely applied in the temperature range from -20 °C to 150 °C and is relatively resistant to thermal and mechanical fatigue. The predictability and fatigue endurance of the mechanism is of essential importance for development of future smart metal matrix composites or smart structures with embedded shape memory alloy components.

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“…The instrument used to carry out the neutron diffraction measurements included the dedicated SALSA at the Institut Laure Langevin (ILL), Grenoble France. Details of this instrument are described in [22,23]. The neutron wavelength and the nominal Bragg angle were 1.648 Å and 98.8°respectively.…”

Section: Ring Weldmentioning

confidence: 99%

Application of multiple analysis methods in optimising complex residual stress characterisation

Hossain

Zheng²,

Truman³

et al. 2017

Exp Tech

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An accurate characterisation of residual stress plays an important role in the structural integrity assessment of an engineering component. Several techniques and tools are available for measuring and predicting residual stresses. For example, neutron diffraction (ND) and X-ray diffraction (XRD) are non-destructive techniques used for measuring through-thickness and surface residual stresses respectively, while the deep-hole drilling (DHD) and the incremental centre-hole drilling (ICHD) are semi-destructive techniques and measure through-thickness and sub-surface residual stress respectively. In most open literature, a more favoured method is traditionally used over others, with some degree of validation using finite element analysis (FEA) predictive tool. In this paper it will be shown that the different methods and tools available are not contradicting or more superior to the others, but rather, the use of more than one available technique complementary to each other can improve the quality and the confidence in the characterisation of the residual stress state in an engineering component. In particular, the accurate knowledge of the residual stress field for a safety critical component plays a vital role for subsequent structural integrity assessment.

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SALSA—A new instrument for strain imaging in engineering materials and components

Cited by 143 publications

References 12 publications

Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments

Engineering the residual stress state and microstructure of stainless steel with mechanical surface treatments

Internal stresses in steel plate generated by shape memory alloy inserts

Application of multiple analysis methods in optimising complex residual stress characterisation

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