Creep Fatigue Testing Machine

The Creep Fatigue Testing Machine is designed to evaluate the creep, creep-fatigue, hydrogen embrittlement, and cyclic loading behavior of materials under high-temperature, high-pressure, and high-stress conditions. It combines precise force and strain control with a fully electric loading system, making it suitable for simulating complex service conditions and studying long-term material performance.

The RPD series uses a central-drive ball screw and rigid dual-column frame without a hydraulic oil source. It is particularly suitable for creep-fatigue tests involving alternating tensile and compressive loads, as well as material research where accurate loading and deformation control are required.

Application

The machine is suitable for:

(1) Creep Testing：Evaluating time-dependent deformation of metallic materials under sustained load and controlled temperature.

(2) Creep-Fatigue Testing：Studying material behavior under the combined effects of sustained loading and cyclic loading.

(3) Cyclic Tensile/Compressive Testing：Evaluating materials subjected to repeated tensile and compressive loads.

(4) Hydrogen Embrittlement Research：Supporting mechanical evaluation of materials exposed to hydrogen-related service conditions when the appropriate environmental accessories are configured.

(5) High-Temperature Material Research：Testing materials used under elevated-temperature service conditions.

(6) Aerospace and Energy Materials：Evaluating materials intended for components exposed to long-term thermal and mechanical loads.

(7) Materials Development and Selection：Providing experimental data for material design, selection, and performance comparison.

Standards

Relevant international standards include:

(1) ASTM E139 — Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials

(2) ISO 204 — Metallic materials — Uniaxial creep testing in tension — Method of test

(3) ASTM E2714 — Standard Test Method for Creep-Fatigue Testing

(4) ASTM E606/E606M — Standard Test Method for Strain-Controlled Fatigue Testing

(5) GB/T 2039 — Metallic materials — Uniaxial creep testing in tension — Method of test

The final standard configuration should be confirmed according to the required test method and specimen conditions.

Parameters

Features

(1) Designed specifically for creep-fatigue and cyclic loading applications.

(2) Fully electric drive system eliminates the need for a hydraulic oil source.

(3) Central-drive ball screw provides direct and stable axial loading.

(4) Rigid dual-column structure improves frame stiffness and loading stability.

(5) Direct force application to the specimen helps reduce unnecessary transmission effects.

(6) Loading speed can be controlled from 1 μm/h to the rated speed, with a specified speed tolerance of ±0.1%.

(7) Suitable for alternating tensile and compressive loading with dedicated fixed-load accessories.

(8) High-frequency control of up to 1 kHz supports force and strain control for dynamic applications.

(9) Precise specimen temperature control helps maintain a uniform temperature distribution along the specimen.

(10) Adjustable crosshead provides flexible test-space height for different specimen configurations.

FAQ

(1) What is the difference between creep and creep-fatigue testing?

Creep testing generally evaluates time-dependent deformation under sustained loading, while creep-fatigue testing combines sustained or hold periods with cyclic loading. The latter is useful for studying damage caused by the interaction between creep deformation and repeated mechanical loading.

(2) What materials can be tested with this machine?

The system is primarily intended for material research involving metallic materials subjected to long-term or cyclic mechanical loading. High-temperature alloys and other engineering metals can be tested when the selected load, fixture, temperature, and environmental configuration meet the requirements.

(3) Why is a high-frequency control system important for creep-fatigue testing?

Creep-fatigue tests may involve both slow long-term deformation and cyclic loading. A control frequency of up to 1 kHz provides the response needed for dynamic force or strain control, while the appropriate frequency and waveform should be selected according to the test method.

(4) Does the machine require a hydraulic system?

No. The series uses a fully electric central-drive ball-screw system and does not require a hydraulic oil source. This design simplifies the loading system and is suitable for laboratories that require precise long-term force, displacement, or strain control.

(5) How should the model and load capacity be selected?

Selection depends on specimen dimensions, expected stress, maximum force, temperature, loading waveform, and applicable test standard. QINSUN engineers can evaluate these requirements and recommend the appropriate model, fixtures, furnace, and extensometer. Equipment is calibrated and functionally tested before shipment. Contact a our engineer for a detailed configuration proposal.