Kappa SS-CF

Test load

50 - 100 kN

Temperature range

-80 to +2,000°C

Type of test

CF, LCF
CCG, CFCG
FCGR,TMF
SSRT, HE
Creep
Stress Relax
Tensile
Compression
Flexure

Standards

ISO 204
ASTM E139
EN 2002-005
ASTM E2714
ASTM E2760
European CoP for TMF

The optimal testing machine for demanding tests, also under alternating load

This patented electromechanical fatigue testing machine with backlash-free zero crossing features a central lead screw and is ideal for force and strain controlled creep fatigue tests. The Kappa SS-CF provides extremely high flexibility, covers the complete range of creep testing applications and is ideal for a wide range of creep tests with alternating load at both ambient and high-temperature conditions.

Force and strain controlled creep fatigue tests with alternating load (through zero)
e.g. CF, LCF, CFCG and TMF tests
Advanced creep tests
- Fatigue tests with threshold and alternating load
- Strain modeling (e.g. determination of creep curve at different loads)
- Creep test with slow strain rates (SSRT)
- Creep data from components tests
Static and cyclic crack growth/widening test
Determination of hydrogen embrittlement
Tests with stepless force and temperature adjustment
Relaxation tests
Creep test 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

The Kappa SS-CF in use

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Hight temperature testing up to +2.000°C

Customized high-temperature testing system for tensile, compression, flexure, creep fatigue and shear tests on ceramic matrix composites (CMC) at ultra-high temperatures up to +2,000°C in vacuum and inert gas environments.

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Thermomechanical fatigue testing

Innovative testing solution for thermomechanical fatigue testing on turbine and motor materials according to the European Code of Practice, ISO 12111 and ASTM E2368.

Advantages & features

Specific machine design

Specially designed and patented for fatigue tests
Load frame with play-free central lead screw drive and precision guidance provided via four steel columns for precise, axial loading
Adjustable crosshead enables maximum flexibility in test area height
High drive control frequency from 1000 Hz, which enables precise force and strain control for a large application range.
High-resolution force and travel measurement for optimum control properties, especially at very low test speeds
Precise loading speed with ±0.1% tolerance of the set speed in the measurement range of 1μm/h to 100 mm/min unloaded or under constant load
Precision testing machine to DIN EN ISO 7500-1

Axial alignment

Central lead screw for axial alignment to ASTM E292
Accessories: Fixed load spring for alternating tensile/compression loading with optimal alignment properties to ASTM E012
Option: Alignment fixture for axial alignment to ISO 23788:2012 and NADCAP requirements (± 5% flexural stress)

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.

Kappa SS-CF for special applications

Thermomechanical fatigue testing

The Kappa SS-CF allows for thermomechanical fatigue testing in accordance with the European Code of Practice (CoP), ISO 12111 and ASTM E2368.

Kappa SS-CF for creep fatigue (CF) tests

Advanced creep testing

The backlash-free zero crossing of the patented Kappa SS-CF ensures reliable results for demanding creep tests including CF, LCF and CFCG.

Technical overview

Type	Kappa 50 SS-CF
Test load, max. Fmax	50 kN
Test frame dimensions
Width	860 mm
Depth	655 mm
Height	2212 mm
Test area depth	Unlimited
Test area width between the lead screws	720 mm
Test area height, max.	1090 mm
Crosshead travel	200 mm
Lateral guidance of the moving crosshead via precision bearings on four hard-chromed guide columns	Diameter 40 mm
Test speed range	0,001 mm/h to 250 mm/min
Test speed accuracy (measured over an interval of min. 5 s or 10 mm travel)	< ± 0,1 %
Position transducer travel resolution	0.14 nm
Weight	700 kg

Type	Kappa 100 SS-CF
Test load, max. Fmax	100 kN
Test frame dimensions
Width	860 mm
Depth	655 mm
Height	2212 mm
Test area depth	Unlimited
Test area width between the lead screws	720 mm
Test area height, max.	1090 mm
Crosshead travel	200 mm
Lateral guidance of the moving crosshead via precision bearings on four hard-chromed guide columns	Diameter 40 mm
Test speed range	0,001 mm/h to 250 mm/min
Test speed accuracy (measured over an interval of min. 5 s or 10 mm travel)	< ± 0,1 %
Position transducer travel resolution	0.14 nm
Weight	700 kg