Materials employed in the automotive, aerospace and power station construction industries must in particular be able to withstand a wide range of temperatures. Key properties for investigation are heat resistance, re-crystallization temperature and thermo-elastic behavior. To enable the tests required for development work to be performed with maximum efficiency, Zwick can supply a testing machine equipped with both a temperature chamber and a high-temperature furnace. This combination allows measurements in a temperature range from -150°C to +1,200°C, making the machine suitable for a wide variety of applications. Among the organizations taking advantage of this is a Chinese aerospace research institute. Minus temperatures as found at commercial airline cruising heights can be simulated equally as well as the high temperatures occurring in and around turbines.
The AllroundLine testing machine with AC drive is zero-maintenance, attains maximum forces up to 250 kN in the tensile and compression directions and offers excellent constant velocity characteristics at very low speeds. The temperature chamber is designed for temperatures between -80 and +300°C, but can be used down to -150°C with liquid nitrogen. For the high-temperature furnace there is a choice between 1 and 3-zone versions with air or vacuum environment - the minimum temperature is +200°C, while the maximum temperature is +1,600°C. Strain measurement for all the above temperature ranges is handled by the non-contact laserXtens extensometer. laserXtens consists of two measuring heads with digital cameras and laserlight sources mounted on motorized carriages. This laser-optical method eliminates the need for specimen marking in tensile tests. Instead,„virtual gauge marks“ are generated through illumination of the specimen with coherent light, the movement of which is tracked in real time. Both furnace and extensometer are equipped with swivel units for convenient operation aroundthe testing machine.