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Metallurgical testing

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Metallurgical testing – Controls and Expert analyses

SONATS is equipped with all the means and tools necessary for metallurgical controls and expert analyses.

This equipment is distributed between the Carquefou laboratory and the local partners of the SONATS projects.

These investigative methods can be used to complete comprehensive expert analyses, in particular in addition to residual stress measurements and dimensional controls.

  • Metallographic preparation

Cutting, mounting, polishing, etching

  • Microscopy

Optical microscopy, scanning electron microscopy (SEM), EDX analysis, image analysis

  • Hardness

Vickers and Knoop microhardness, Vickers macrohardness

Interview-MFN---De-la-caractérisation-des-matériaux-au-procédé-de-grenaillage---SONATS

Discover our process from material characterization to impact surface treatment solution. Download our article : Advanced characterization control and inspection in shot peening

Examples of metallurgical testings: macrographic control, thickness, phase proportion, defects and porosity observations, microstructure, coating thickness, decarburisation depth, inclusion analysis, hardness before/after treatment, quench and treatment depth, weldment controls, chemical analysis, diffusion study, concentration profile, fracture surfaces analysis, corrosion, cracking, etc.

  • Crystallography – X-ray diffraction (XRD)

Conventional XRD, grazing incidence XRD, synchrotron XRD, in situ XRD under temperature control and mechanical stress

Examples of metallurgical testings: to ensure that a product conforms to the required crystallography, to quantify the phase proportions, coating and thin layer structures, identification of precipitation hardening in alloys, evolution of phases in the heat affected zones of welds, etc.

  • Chemical analyses of materials

Elemental gas analyses CSONH, ICP-OES and ICP-MS, GDMS, Auger-XPS, SIMS

  • Corrosion-electrochemistry tests

Salt spray testing according to ASTM B117 and ISO9227, climatic chambers according to ISO 6270-2, SO2 in a humid environment according to ISO 3231 and DIN 50018, electrochemical cell and galvanic cutting on 16-channel galvanostat

Examples of metallurgical testings: environmental resistance, corrosion inhibitors, pickling optimisation, precipitation study, etc.

  • Accelerated ageing

UV irradiation according to ISO 11507, complete solar spectrum irradiation according to ISO 11341, thermal shocks from -40°C to 180°C

  • X-ray-tomography

X-ray radioscopy, neutron radioscopy, X-ray tomography, synchrotron X-ray tomography, neutron tomography

Examples of metallurgical testings: study of assembly defects (gluing, welding, riveting), material health (porosity, cracking, voids), interface and thickness of coatings, inclusion form factors, 3D study, large assemblies study, etc.

  • Mechanical tests (since 2016)

Tensile testing, impact testing, fatigue testing, adherence of bonded assemblies and coatings

  • Thermal analyses

Dilatometry, differential thermal analysis (DTA), thermal gravimetric analysis (TGA), differential scanning calorimetry (DCS), dynamic mechanical analysis (DMA)

Examples of metallurgical testings: determination of expansion coefficients, phase transformation temperature, reaction enthalpy, heat capacity, etc.

  • Various

Density measurement by double weighing, pycnometre, chambers, ovens, centrifuges.

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