MATERIALS ENGINEERING LABORATORY

Most Recent Research Devices FACULTY OF TECHNOLOGY/Department of Mechanical Engineering, Materials Engineering Laboratory/ Seppo Järvenpää 30.4.2020

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TOPICS

Micro Indentation Tester 2009 NEW Thermo Mechanical Simulator (GLEEBLE 3500) 2010 Glow Discharge Optical Emission Spectrometer (GDOES) 2011 Confocal Laser Scanning Microscope 2012 Modernisation of Servo Hydraulic Test Machine (MTS) 2012 2 30.4.2020

MICRO INDENTATION TESTER

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MICRO INDENTATION TESTER

Standard resolution of X/Y tables: 0.25 µm per axis Repositioning accuracy of standard tables: 1 µm per axis Anti-vibration table 30.4.2020

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MICRO INDENTATION TESTER

5 Vickers indenter Spherical indenter Berkovich indenter 30.4.2020

MICRO INDENTATION TESTER

6 Fig. Schematic of a typical depth instrumented indentation curve.

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MICRO INDENTATION TESTER

Real typical depth-instrumented indentation curve.

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MICRO INDENTATION TESTER

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MICRO INDENTATION TESTER

Continuous Multicycles Modes (CMC) method.

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THERMO MECHANICAL SIMULATOR (GLEEBLE 3800)

10 Maximum heating rate - ca. 10.000 ° C/s up to melting temperature Cooling rates - up to ca. 100 ° C/s - or forced cooling by gas flow or quenching Maximum loading capacity - 200 kN of static force in compression or 100 kN in tension Max. speed of the moving anvil - 2 m/s (strain rates between 0.001 ... 50 1/s) 30.4.2020

THERMO MECHANICAL SIMULATOR (GLEEBLE 3800)

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Applications such as:

- simulation of continuous casting - simulation of hot rolling or forging processes - hot tension or compression (axisymmetric or plane strain) tests, stress-strain curves - hot ductility testing - softening kinetics by stress relaxation - simulation of annealing treatments - simulation of welding thermocycles - determination of TTT and CCT diagrams, including the effect of deformation - thermal fatigue and creep deformation 30.4.2020

THERMO MECHANICAL SIMULATOR (GLEEBLE 3800)

12 Hot/Warm Deformation: Plane strain compression test. In single- or multiple hit compression tests, strain and strain rate are controlled separately yet synchronously using the optional Hydrawedge® (see arrow).

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GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

13 Model GDA 750 PMT, CCD 30.4.2020

GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

14 Atoms are sputtered from the sample surface by a plasma (ionised argon atoms).

Sputtered atoms emit photons with characteristic wavelengths.

The intensities of different wavelengths are measured.

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GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

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GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

16 BULK ANALYSIS - fast, few minutes/analysis - minimal sample preparation - pre-burn clears the surface being measured - detection limit 1…10 ppm -some knowledge of the measured sample is needed DEPTH PROFILING - analysing of surface layers up to 200 μm (coatings, films etc.) - depth resolution of 1-5 nm - intesities vs. time 30.4.2020

GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

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GLOW DISCHARGE OPTICAL EMISSION SPECTROMETER (GDOES)

18 Analysis trace on steel plate (anode diameter 2.5 mm) 30.4.2020

CONFOCAL LASER SCANNING MICROSCOPE

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CONFOCAL LASER SCANNING MICROSCOPE

20 TIEDEKUNTA TIEDEKUNTA / osasto osasto osaston osasto / Etuniminen Sukuniminen-Sukuniminen 30.4.2020

CONFOCAL LASER SCANNING MICROSCOPE

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(confocal)

Laser Scanning Microscope,

(c)

LSM - Confocal Scanning Microscope, CSM

(white light)

- Dual Core 3D Profiler

(white/blue LED, confocal & interferometry)

- Color 3D Laser Scanning Microscope

(Laser + white light)

- 3D Measuring Laser Microscope

(Laser + white LED) 30.4.2020

CONFOCAL LASER SCANNING MICROSCOPE

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CONFOCAL LASER SCANNING MICROSCOPE

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CONFOCAL LASER SCANNING MICROSCOPE

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CONFOCAL LASER SCANNING MICROSCOPE

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MODERNISATION OF SERVO HYDRAULIC TEST MACHINE (MTS)

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MODERNISATION OF SERVO HYDRAULIC TEST MACHINE (MTS)

27 • • • • • • Facilities: -istalled 1991, modernisation 2012 -static and dynamic force capacity ± -load cells ± 15 kN and ± 250 kN 250kN, maximum frequency 20Hz -piston stroke 150 mm -extensometers ± 1 mm (dynamic) and ± 4 mm (static) • • Applications such as: -tensile tests, fatigue tests, fracture toughness tests (CTOD) • • • • • Coming procurements 2014: -thermal camera -optical extensometer -new (better) grips for flat and round specimens (-bending facilities (possibly)) 30.4.2020

MODERNISATION OF SERVO HYDRAULIC TEST MACHINE (MTS)

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MODERNISATION OF SERVO HYDRAULIC TEST MACHINE (MTS)

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MODERNISATION OF SERVO HYDRAULIC TEST MACHINE (MTS)

30 Risks of the Fatigue?

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