This method of cutting a high-hardness material with a multi-wire saw includes the steps of: (A) providing at least one ingot which includes a body portion 10a with two ends and a low-quality crystal portion 10e that is located at only one of the two ends of the body portion; (B) fixing the at least one ingot onto a fixing base; and (C) slicing the at least one ingot by moving the ingot with respect to a saw wire so that the saw wire does not contact with the low-quality crystal portion 10e of the at least one ingot but does contact with its body portion 10a.

A method and apparatus for forming a starter notch along the length of a work-piece for subsequent fatigue testing. The starter notch is formed with a cutting wire such that it will promote fatigue-cracking in the work-piece in one defined direction and avoids cracking in directions other than the length direction of the starter notch. Improved fatigue-testing analysis may therefore be realized.

The invention relates to a blade decommissioning tool for decommissioning an installed wind turbine blade. The blade decommissioning tool comprises cutting means for cutting through the wind turbine blade in a transversal direction perpendicular to a longitudinal direction L of the wind turbine blade to form a proximal and distal part of the wind turbine blade; lowering means for lowering the distal part of the wind turbine blade relative to the proximal part; support means for supporting the cutting means and the lowering means; and clamping means for clamping the support means to wind turbine blade.

An overhead sawing device comprising a central frame, a cutting cable, a driving unit, a first and a second arms configured to deflect the cutting cable to a lower level, at least two rotatable arms configured to receive the cutting cable from the higher level and to guide said cable during a cut. The device further includes a telescopic cable tensioning element. A method of operating the device is also provided, which method permits the execution of a continuous cut without repositioning the device, even in confined spaces.