Abstract
1. To measure the deformations occurring during the process of etching specimens for determining the residual stresses in the surface layer, it is expedient to use mechanotron transducers. The small diode mechanotrons are distinguished by their good indicators of accuracy, small measuring force, and the possibility of devising on their basis automated systems for measuring small shifts. 2. If the TCL used in grinding titanium alloys with Alundum wheels are liquid carbon dioxide, solid graphite- or molybdenum-disulfide-base lubricants, or else 2% soda solution, the residual stresses in a thin surface layer are larger than when machining is carried out without cooling. 3. Successive grinding, abrasive and diamond polishing under certain machining conditions causes in the surface layer of titanium alloy small residual stresses (up to 10 kgf/mm2). 4. After abrasive treatment of titanium alloy, residual stresses occur in the surface layer in two mutually perpendicular directions — in the direction of grinding and transversely to it — and they are different in magnitude as well as in sign. It is essential to take this into account in selecting the direction of machining in the finishing operations.
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