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FraunhoFer InstItute For MechanIcs oF MaterIals

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Dr. Dirk Helm

Phone +49 761 5142-158, dirk.helm@iwm.fraunhofer.de

F r a u n h o F e r I n s t I t u t e F o r

M e c h a n I c s o F M a t e r I a l s I W M

Thermophysical quanTiTies

and Thermomechanical TesT

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Pierre Bienger

Phone +49 761 5142-381

pierre.bienger@iwm.fraunhofer.de

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Andre Koch

Phone+49 761 5142-466

andre.koch@iwm.fraunhofer.de

W h Y W o r K W I t h u s ?

W W W . I W M . F r a u n h o F e r . d e

W W W . I W M . F r a u n h o F e r . d e / t h e r M o p h Y s I K

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As research partner for industry and public bodies, Fraunhofer IWM

develops solutions that can improve energy and resource efciency

during manufacture and use of materials and components and can

reduce losses involved in the production, conversion and storage of

energy. The solutions lead to greater component durability, longer

service life and improved reliability as well as more cost-efcient

processes.

Woehlerstrasse 11

79108 Freiburg, Germany

Phone +49 761 5142-0

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Directors

Prof. Dr. Peter Gumbsch

Prof. Dr. Ralf B. Wehrspohn

The Fraunhofer IWM uses the latest materials science and

technology ndings to increase material and component

performance levels and create innovative functionalities and

to improve manufacturing processes.

The institute uses its understanding of material behavior to assess

materials and components under a wide range of environmental

conditions and loads: this leads to increased durability, reliability

and availability of components, systems and entire plants.

The well-established link between experimentation and simula-

tion at the Fraunhofer IWM provides an excellent basis for solving

materials technology issues, particularly where resource or energy

savings during manufacture and in use are concerned.

For the virtual development and assessment of materials and

components, the institute works with advanced multiscale

simulations on the nano, micro and macro level or develops

the appropriate models.

The development of and changes to material properties along

a chain of different manufacturing stages can be predicted for

entire manufacturing processes.

http://www.iwm.fraunhofer.de/http://www.iwm.fraunhofer.de/thermophysikhttp://www.iwm.fraunhofer.de/thermophysikhttp://www.iwm.fraunhofer.de/

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In our thermophysical laboratory we determine thermal

expansion, specic heat capacity, density, and thermal diffusivity.

From these quantities we calculate the thermal conductivity

of materials. There is a great variety of materials which can be

analyzed by us, ranging from metals, plastics, ceramics and

thermoelectric materials to reactive coatings. We test specimens

in the form of pastes, powders, liquids, and solids at temperatures

from ambient to 2 000 C.

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With our testing equipment of the type Gleeble 3150 we offer

you the thermomechanical characterization of metallic materials.

We heat conductive materials up to melting temperature and

apply mechanical loads under force or deformation control. Thus,

we are able to simulate heat treatment and welding processes,

and we can conduct warm tension or compression tests. Additio-

nally we determine Time-Temperature-Transformation diagrams,

temperature dependent ow stress curves and temperature

cycles with super-imposed tension-compression loads.

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Measuring from room temperature (RT) to 1 600 C

at heating rates from 0.01 to 50 K/min

Determination of transformation temperatures

Quantitative assessment of exothermal and endothermal

reactions

Measuring in different gas atmospheres and in vacuum

Typical specimen dimensions with solid materials

diameter 5 x 1.2 mm

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Measuring from RT to 1 600 C at heating rates from

0.01 to 50 K/min

Assessing the coefcient of thermal expansion, phase

transformations and transformation temperatures

Measurements in various gas atmospheres and in vacuum

Typical specimen dimensions: diameter 3 to 10 mm with

length of 5 to 25 mm, similar dimensions for sheet

materials

Measurement of the thermal diffusivity in the range of

0.001 to 1.0 mm2 and from RT to 2 000 C at heating ra

between 0.1 and 50 K/min

Measurements in various gas atmospheres and in vacuum

Diameters of 6, 10, and 12.7 mm for cylindrical specime

max 10 x 10 mm2 for rectangular specimens

Specimen thickness depends on the expected thermal

diffusivity

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Heating rates up to 8 000 K/s, cooling rates up to about

2 500 K/s

Mechanical loads under force or displacement control

Measurement possible in various gas atmospheres and in

vacuum

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Analyses of microstructure by Light or Scanning Electron

microscopy (EDX and EBSD analyses where applicable)

Distribution of elements with Glow Discharge Optical Em

Spectroscopy(GDOES)

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0.1

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temperature in C200

DSC in mW/mg

400 600 800 1000 1200

cool down

heat-up

912 C580 C

874 C

742 Cexo

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l F eqim (lFa)