The Z250 SNS AllroundLine floor-standing testing machine with lateral test-area is used to test the materials used in turbine blades (Ni alloy). The main test area is occupied by tensile tests according to ISO 6892-1 (using hydraulic grips), together with technological bending tests according to DIN 50111 at room temperature. These flexure tests involve metallic materials with welded joints and a 3-point flexure test kit has been added to the materials testing machine for this purpose. The lateral test-area is equipped with a 3-zone round furnace for high-temperature tensile tests according to ISO 6892-2 on round specimens in a temperature range from 200°C to 1200°C.
For room-temperature strain measurement Siemens relies on makroXtens II HP - Zwick Roell's "all-purpose" extensometer. This contact-type extensometer records deformations on the specimen in accordance with EN ISO 9513 accuracy class 0.5 and transmits them to testControl II. Change-in-length measurement in high-temperature tensile tests is also performed with a contacting extensometer.
As well as enabling Siemens' Berlin gas turbine plant to avoid time-consuming reconfiguration operations, this AllroundLine testing solution eliminates tedious fixture changes and avoidable set-up costs. Moreover, the side test-area allows a wide range of applications with minimal space requirements. A further advantage of the materials testing machine is the ease with which the operating height can be adjusted to a convenient level.