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Kappa SS-CF

Electromechanical creep testing machine for demanding creep tests

This patented electromechanical creep testing machine with zero-backlash drive covers the complete range of creep testing applications. The Kappa SS-CF features a central lead screw and is ideal for force- and strain-controlled creep tests with alternating load, e.g. CFCG and TMF.

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Key Advantages and Features of the Kappa SS-CF

Applications

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

Creep fatigue test (through zero)
Creep test
Creep test up to break:
- Creep rupture
- Stress rupture
Relaxation test
Static and cyclic crack growth/widening test
Tests with stepless force and temperature adjustment
Advanced creep tests:
- Fatigue tests with threshold and alternating load
- Strain modeling (e.g. determination of creep curve at different loads)
- Creep ductility
- Creep property deterioration during operating life
- Creep data from components tests
Tensile, compression, flexure, CF or breaking strength tests
Force-controlled and strain-controlled creep fatigue tests with alternating loads, e.g. CFCG and TMF.
Long-term tests up to 10,000 h

Advantages and features

Applications: creep tests, creep fatigue tests, creep fatigue interaction and relaxation tests; user-programmed load cycles
High-precision gears and servo motor are located centrally in the load line and move up and down with the moving crosshead
In comparison to standard electromechanical creep testing machines, the Kappa SS-CF creep testing machine stands with its excellent linearity force-deflection curve with backlash-free zero crossing
Virtually backlash-free drive is patent pending: special load train bearing ensures optimum alignment properties in accordance with ISO 23788 and NADCAP requirements

Load frame with single lead screw drive and precision guidance provided via four steel columns, giving precise axial loading and maximum durability
Constant moving crosshead speed via central precision ball screw
Optional digital closed loop control for force and strain

Load string with optimum alignment properties in accordance with ASTM E292
High-resolution force and travel measurement for optimum control properties, especially at very low test speeds
Wide range of machine accessories for flexible application options, complemented by intelligent electronics and software

Kappa SS-CF for Special Applications⁽²⁾

Advanced creep testing

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

Advanced creep testing

The backlash-free zero crossing of the patented Kappa SS-CF ensures reliable results for demanding creep tests including creep-fatigue tests.
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. Specimen-specific inductors and cooling nozzles ensure optimal temperature distribution, as well as heating and cooling rates of up to 25 K/s.

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. Specimen-specific inductors and cooling nozzles ensure optimal temperature distribution, as well as heating and cooling rates of up to 25 K/s.

Technical Overview

Type	Kappa 50 SS-CF	Kappa 100 SS-CF
Test load, max. (Fmax)	50	100	kN
Dimensions of the test frame
Width	860	860	mm
Depth	655	655	mm
Height	2212	2212	mm
Test area depth	Unlimited	Unlimited
Test area width between the lead screws	720	720	mm
Test area height, max.	1090	1090	mm
Crosshead travel	200	200	mm
Lateral guidance of the moving crosshead	Via precision bearings on four hard-chromed guide columns (40 mm diameter)
Test speed range	0.001 mm/h to 250 mm/min	0.001 mm/h to 250 mm/min
Accuracy of the test speed	< ± 0.1 % (measured over an interval of at least 5 s or 10 mm travel)
Position transducer travel resolution	0.14	0.14	nm
Weight	700	700	kg

Product Information Available for Download

Kappa SS-CF for Thermo-Mechanical Fatigue Testing on Turbine and Motor Materials

For the design and construction of thermal and simultaneously mechanical cyclic loaded components for gas turbines or combustion engines for example, reliable characteristic values for the prediction of the fatigue life and the cyclic deformation behavior under existing operating conditions must be available. In thermo-mechanical fatigue testing, the required material characteristics are determined through the in-phase or out-of-phase combination of cyclic thermal and mechanical loads.