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Kappa DS

Electromechanical creep testing machine for tests up to 10,000 hours Download
Test load
  • 50 - 250 kN
Temperature range
  • -80 to +2,000°C
Type of test
  • Creep
  • Stress Relax
  • SSRT, HE
  • CCG
  • Tensile
  • Compression
  • Flexure
Standards
  • ISO 204
  • ASTM E139
  • EN 20002-005
  • ASTM E1457
  • ASTM G129
  • ASTM F519

The ideal testing machine for tests in various environmental conditions

The flexible electromechanical creep testing machine Kappa DS is equipped with a double lead screw and was designed for classic and advanced creep tests. The large crosshead travel and the associated expanded test area provide sufficient space for temperature, vacuum or inert gas chambers for example, making this testing machine ideal for tests under various environmental conditions.

The Kappa DS electromechanical creep testing machine offers a wide range of applications in ambient and high-temperature conditions:

  • Advanced creep tests
    - Fatigue tests in the tensile range
    - Strain modeling (e.g. determination of creep curve at different loads)
    - Creep ductility
    - Creep test with slow strain rates (SSRT)
    - Creep data from components tests
  • Crack growth and widening tests
  • Determination of hydrogen embrittlement
  • Tests with stepless force and temperature adjustment
  • Relaxation tests
  • Creep tests up to break
  • - Creep rupture
    - Stress rupture
  • Classic creep tests
  • Short-term tensile, compression and flexure tests can also be performed with this testing machine

Creep tests on aluminum specimens

For creep and stress relaxation testing, Hydro Aluminium uses a Kappa 50 DS with temperature chamber up to +250°C.

Advantages & features

Advantages & features

Specific machine design
Axial alignment
Precise specimen temperature
Intelligent electronics and software
Optimal extensometer
Wide range of accessories
Ready for changes in future technology

Specific machine design

  • Load frame with dual lead screw drive and precision guidance via four steel columns for precise axial loading
  • Dual lead screw drive
  • High drive control frequency of 1000 Hz. This allows for precise force and strain control for a wide range of applications.
  • High-resolution force and travel measurement for optimum control properties, especially at very low test speeds
  • Precise loading rate with tolerance of ± 0.1 % of the set speed in the measurement range of 1 μm/h to nominal speed, unloaded or under constant load
  • Wide force measurement range for tests with small and large forces according to DIN EN ISO 7500-1 in class 0.5 and class 1
  • Precision testing machine to DIN EN ISO 7500-1

Axial alignment

  • Load string with optimal alignment properties in accordance with ASTM E1012
  • Spherical mounting ensures self-adjusting alignment in tensile tests and low, standard-compliant flexural stress (± 10%)

Precise specimen temperature

  • High-temperature furnace, temperature chamber or induction heating system – selection based on test temperature of type of test
  • One, two or three specimen thermocouples – dependent on the specimen length
  • Automatic and specimen-centered entrainment of the thermocouples and the furnace – also in case of long elongations and long test duration
  • Operator-independent temperature control with automated adaptation of the control parameter for influencing factors such as
    - Heating rates and target temperature
    - Specimen size, material and shape
    - Number of thermocouples
  • Guaranteed uniform temperature distribution along the specimen
  • No overshooting of the specimen temperature upon reaching the target temperature
  • Empirical determination of the control parameters for individual temperatures is no longer necessary
  • Wide temperature range with tolerances better than ISO 204 and ASTM E139:
    200°C to 400°C: ± 2 K
    400°C to 1,150°C: ± 1 K

Intelligent electronics and software

  • Consistent workflow orientation reduces training needs to a minimum
  • Strain and force controlled load application (stepless/in blocks)
  • Selectable digital closed loop force, stress and strain controlled creep tests and stress relaxation tests, as well as user-defined load cycles
  • Easy operation during test performance and test result evaluation
  • Integrated temperature control of the high-temperature controller
  • Temperature control, recording and documentation prior to the test (heating phase)
  • Well designed data security concept

Optimal extensometer

Reliable strain measurement is based on an extensometer that has been optimally matched to the testing application. Therefore, selection of the right extensometer is crucial and is the basis for repeatable test results. ZwickRoell engineers are available to help you select the right extensometer for your application, eliminating any guesswork in deciding on an optical or contact-type extensometer:

  • Non-contact extensometer videoXtens
  • Side-attaching contact-type extensometer:
    -makroXtens with high-temperature sensors
    - Side entry extensometer
  • Axial-attaching contact-type extensometer:
    - Rod-in-tube extensometer
    - 4-rod extensometer
  • DCPD extensometer for measuring the crack growth

Further details are available here.

Wide range of accessories

The wide selection of machine accessories supports many application possibilities, allowing for testing with one and the same testing machine at ambient temperature, high temperature and ultra-high temperature.

  • Furnaces with different dimensions and slots
  • Temperature, vacuum and inert gas chambers
  • Induction heating systems
  • Specimen grips and load strings
  • Contact-type and non-contact extensometers
  • Safety enclosures
  • Hot cell solutions

Ready for changes in future technology

Modular design means that the testing system can be converted or retrofitted whenever required. Moreover, testControl II machine electronics are compatible with future-generation ZwickRoell software.

Technical overview

We will find the optimal solution for your creep test application. Please feel free to contact our experts.

We look forward to discussing your needs.

 

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Downloads

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  • Product information: Kappa DS PDF 375 KB

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