Prism – Residual stress measurement based on hole-drilling and ESPI Prism is an advanced hole-drilling system that dramatically improves the ability to make quick and accurate residual stress measurements. Just like the conventional strain gage hole-drilling systems, the instrument measures changes in the part surface caused by the hole drilling and determines the previously existing residual stresses. However, the often time-consuming application of strain gages is avoided and a large area around the hole is analyzed, not averages from just a few areas. Prism measures surface distortion using electronic speckle pattern interferometry (ESPI). Only minimal sample preparation is required. The update of the coefficient data set in 2015 has significantly improved the quality of the stress results. This also increases the relative depth from which reasonable results can be expected.

Efficient Barkhausen Meter for routine quality inspections Rollscan 250 is an instrument for controlling the surface quality and testing of near-surface defects in a wide variety of ferritic steel and other ferromagnetic materials. Rollscan 250 easily detects defects related to changes of stresses or microstructure. These defects are commonly due to failed grinding, heat treatment, shot peening, or any other surface treatment process.

Rollscan 350 saves on material and labor expenses Rollscan 350 is a digital Barkhausen noise analyzer. It is designed for surface quality control and testing of near-surface defects such as grinding burns, heat treatment defects, as well as changes in stress and microstructure in a wide variety of ferritic steel and other ferromagnetic materials. Inspection with Rollscan is fast and can easily match the production rates of most manufacturing lines, enabling process control in real-time. As a result, significant quality improvements and savings on material and labor expenses have been realized by companies using the Rollscan system. A large selection of sensor types makes Rollscan systems flexible. Piston pins, gears, bearing rings and rollers, camshafts and crankshafts, and landing gears are just some of the parts that can be successfully tested with Rollscan 350.

X-RAY DIFFRACTION is the conventional and time proven technique for measuring residual stresses. Using the interatomic spacing as the ultimate gage length, the X-ray technique is ideal for and applicable to all crystalline materials, especially for metals, but also for ceramics. It measures the absolute stress without the need for an unstressed sample for calibration.

Stresstech Group’s Xstress 3000 G2/G2R represents advances in design and construction, which provide enhanced reliability and function in the first truly portable X-ray stress analyzer.

Residual stress and retained austenite measurements with Xstress Xstress Robot system consists of a robot goniometer with G3 tube holder attached conveniently to an easily movable carrier, X3003 main unit and XTronic software. Robot goniometer now handles the tasks previously made possible by an X-Y system and Floor stand. Xstress Robot includes everything needed for making residual stress or retained austenite measurements by X-ray diffraction. It is especially useful for making measurements on large and complicated parts or surfaces that cannot be moved easily otherwise. Instead of moving the location to be measured, the Xstress Robot system moves onto the measurement location with minimum efforts. Mapping within the robot’s reach is handled with the XTronic software, and when a measurement needs to be made further away, the whole Xstress Robot system can be moved to the new position.