High temperature water vapor medium slow strain rate stress corrosion testing machine

1. Equipment introduction
The slow strain rate (SSRT) stress corrosion (SCC) testing machine is used to conduct slow strain rate tensile tests, constant load creep/stress corrosion tests, low cycle fatigue/corrosion fatigue tests/axial strain fatigue, sample crack initiation and crack growth rate measurement tests (constant K control, rising K control, falling K control), etc. on materials in corrosive environments.
The host structure is in the form of a frame, and the loading unit can be flexibly installed at the upper or lower end of the rack according to test requirements to adapt to the test requirements of different media environments.
This testing machine consists of an experimental kettle system, a water heating and high-temperature water vapor circulation control system, a lifting device, a cooling system, etc. It is mainly used to test the creep properties and slow tensile properties of metal and alloy materials in high-temperature water vapor environments.
2. Equipment characteristics
1) High rigidity and heavy load frame;
2) High-performance fully digital controller with high control accuracy and easy expansion;
3) Dual strain sensors enable accurate measurement of sample deformation;
4) Pressure balancing device;
3. Test function
1) It has the tensile testing function of an ordinary electronic universal testing machine.
2) Constant load creep and tensile stress relaxation tests.
3) Slow strain rate tensile test, minimum tensile speed: 1x10-7mm/s.
1) The cooling water is cut off and the machine stops automatically.
4. Characteristics of test software
1) Supports metric units and imperial units;
2) Support function navigation, select the corresponding test function according to the navigation interface;
3) Real-time display of force, displacement and deformation values
4) Draw force-displacement curve, force-strain curve, force-time curve, strain-time curve, stress-strain curve, etc. in real time;
5) Support the process design of sample control to facilitate the expansion of test methods;
6) Support slow strain loading control;
7) Support automatic and manual test log recording;
8) Support function recovery after test suspension;
9) Support test recovery function after power failure;
10) Supports retention of collected data after power failure;
11) Support long-term continuous testing of more than 30 days;
12) Test data can be exported to EXCEL and ACCESS formats;
13) Support equipment overload protection and various equipment safety and test safety protections
5. Technical parameters
1) Maximum test force: 50kN
2) Test force range: 1%～100%F.S.
3) Relative error of test force indication: ±0.5%
4) Maximum moving range of loading head: 80mm
5) Loading head moving speed: 1mm/s～1x10-7mm/s
6) Loading head displacement measurement accuracy: ±0.5%
7) Loading head displacement resolution: 0.05µm
8) Deformation measurement range: 0～12.7mm
9) Deformation measurement resolution: 0.1µm
10) Deformation measurement accuracy: ±0.5%
11) Experimental kettle operating temperature: normal temperature ~ 700℃
12) The maximum design pressure of the experimental kettle: 5MPa
13) Experimental kettle volume: 3.5L
14) Water circuit system pressure capacity: 0.5MPa
6. Extended functions
1) Equipped with a solution environment chemical measurement cycle system, it can complete slow strain rate tensile tests, constant load creep/stress corrosion tests, stress relaxation, low cycle fatigue/corrosion fatigue tests/axial strain fatigue tests on materials in corrosive environments;
2) Equipped with DCPD crack measurement system and strain gauge, it can complete the crack initiation and crack growth rate measurement test of the sample in the corrosive environment and the crack initiation and crack growth rate measurement test of the sample in the conventional test environment.