DKTP Micro Mechanical Tensile Low Cycle Fatigue Tester

DKTP Micro Mechanical Tensile Low Cycle Fatigue Tester

DKTP micro mechanical tensile low cycle fatigue tester is one of the most typical static and dynamic in-situ testing technologies that can visually monitor the micro deformation damage and structural changes of materials. Our company has developed and produced commercial in-situ tensile low cycle fatigue testers for the micro mechanical performance testing and characterization of materials, including ultra precision in-situ tensile low cycle fatigue tester (Figure 1) and large range in-situ tensile low cycle fatigue tester (Figure 4).This series of experimental equipment was jointly developed with a research team from Jilin University.

Figure 1 Ultra precision in-situ tensile low cycle fatigue tester

application

metal material

alloy material

ceramic materials

bionic materials

composite material

Features and advantages

Ultra precision in-situ tensile low cycle fatigue tester provides precise technical support for material preparation, life sciences, aerospace, and interstellar exploration

A compact ultra precision in-situ tensile low cycle fatigue tester has been developed, which is compatible with optical microscopy imaging equipment

Realize dynamic in-situ observation of material micro deformation damage mechanism and microstructure evolution under load

In depth study of the macroscopic mechanical behavior and microstructural evolution of materials

Equipped with a control host, dedicated detection and control system, and supporting analysis and processing software

advanced design

Piezoelectric actuation ultra precision in-situ tensile low cycle fatigue tester, achieving small size, compact structure, and compatibility with various observation devices

Addressing the issues of long testing cycles and high energy consumption caused by traditional fatigue testing devices primarily relying on testing life curves

Solved the problem that traditional fatigue devices cannot achieve real-time observation of material specimens

Obtaining higher quality images during in-situ observation can provide clearer and more accurate observation and analysis of microstructure

The curves of the elastic stage and pre fracture load of the material over time were measured by instruments, as shown in Figure 2. The in-situ observation image of the surface morphology of the tested material is shown in Figure 3.

Figure 2 Time varying curves of elastic stage and pre fracture load of material (aluminum alloy)

As shown in Figure 2, the curve of the 30 second load variation between the elastic stage and the final fracture shows that 6061 aluminum alloy still exhibits significant plasticity under the action of tensile fatigue coupling load.

Figure 3 In situ observation image of surface morphology of test material

As shown in Figure 3 (a), the entire fracture surface can be roughly divided into three regions: the early stage of crack propagation, the middle stage of crack propagation, and the instantaneous fracture zone. As shown in Figure 3 (b), it was found that the fracture of magnesium alloy under tensile fatigue load is a mixture of intergranular fracture and transgranular fracture. There are a large number of shell like folds near the main crack, indicating that surface dislocations occurred due to compression during crack initiation and propagation.


Technical specifications of ultra precision in-situ tensile low cycle fatigue tester (series PL01, PL02, PLP01, etc.)

Maximum load capacity: 1000N, 3000N (series)

Loading force resolution: 100mN

Fatigue test frequency: 0.001-1Hz/10-20Hz

Range of force testing: 1% to 100% FS

Force measurement accuracy: ± 1% indication

Displacement resolution: 1 μ m

Loading stroke: 10mm

Test speed range: 0-6.5/min

Displacement velocity accuracy: better than ± 0.5% (unloaded)

Speed load capacity: Maximum allowable test force below 3mm/min

Input waveform of piezoelectric stack: sine wave

Sample size: millimeter level

Figure 4 Large range in-situ tensile low cycle fatigue tester

application

metal material

alloy material

ceramic materials

bionic materials

composite material

Features and advantages

A large in-situ tensile low cycle fatigue tester provides precise technical support for material preparation, life sciences, aerospace, and interstellar exploration.

A compact in-situ tensile low cycle fatigue tester with a large range has been developed, which is compatible with optical microscopy imaging equipment

Realize dynamic in-situ observation of material micro deformation damage mechanism and microstructure evolution under load

In depth study of the macroscopic mechanical behavior and microstructural evolution of materials

Equipped with a control host, dedicated detection and control system, and supporting analysis and processing software

advanced design

Using a precision drive unit as the power source and displacement signal output, the precision transmission unit decelerates and amplifies the torque and converts the motion mode, converting the rotational motion into linear motion to apply tensile load to the specimen clamped by the specimen clamping unit. The signal detection unit detects the stress and deformation of the specimen.

Realize small size, compact structure, and compatibility with various observation devices.

Solved the problem that traditional fatigue devices cannot achieve real-time observation of material specimens.

Obtaining higher quality images during in-situ observation can provide clearer and more accurate observation and analysis of microstructure

The material test curve measured by the instrument is shown in Figure 5, and the in-situ observation image of the surface morphology of the tested material is shown in Figure 6.

Figure 5 Material Test Curve

As shown in Figure 5, the experimental data during the elastic stage showed a repeatability error of 3.2%, indicating excellent repeatability.

Figure 6 In situ observation image of material surface morphology

As shown in Figure 6, a fish scale texture appears on the surface of the specimen, indicating that the internal grain structure of the material has undergone significant changes until the fracture image information of the specimen appears.


Technical specifications of a large in-situ tensile low cycle fatigue tester

Maximum load capacity: 3000N

Loading force resolution: 1N

Fatigue loading frequency range: 1-50Hz

Range of force testing: 1% to 100% FS

Force measurement accuracy: ± 1% indication

Displacement resolution: 2.5 μ m

Loading stroke: 20mm

Test speed range: 0-6.5/min

Displacement velocity accuracy: better than ± 0.5% (unloaded)

Speed load capacity: Maximum allowable test force below 3mm/min

Fatigue load waveform: sine wave, triangular wave, rectangular wave, optional

Sample size: millimeter level