POLDI: Pulse Overlap time-of-flight Diffractometer

 

 

 

 

You are here: Home → The instrument → Sample environment → Load frame

Load frame


Figure 1. Load frame positioned horizontally.

Overview

The POLDI load frame has a load capacity of maximal 30 kN. Measurements in horizontal and vertical position (figure 1) are possible. This allows measuring the lattice strain evolution both parallel and perpendicular to the tensile axis (axial and transverse strains). A typical example of such a measurement is given in case study 2.

Neutron collection can be performed under constant load or constant displacement conditions, or a combination of both.

Sample geometry

Several samples geometries are possible:


For other types of specimens (such as wires, compression samples, ...) contact one of the beamline scientists


Figure 2. Example of a flat tensile specimen. Click here for the technical drawing (pdf, 100 kB).

Figure 3. Example of a round tensile specimen with M6 thread.Click here for the technical drawing (pdf, 100 kB).

Figure 4. Example of a round tensile specimen with M12 thread.Click here for the technical drawing (pdf, 100 kB).

Figure 5. Example of a round fatigue specimen with M12 thread.Click here for the technical drawing (pdf, 100 kB).

Strain measurement

Currently three methods for strain measurements are available: