Abstract
In the research and development for a new material, it is important to evaluate the strength under various conditions. A measuring device called strain gauge is often used for its simplicity. In the development of the material for gas turbine engines, high temperature and high pressure are typical extreme environmental conditions. Under such extreme conditions, the conventional gauge peels off, disconnecting the gauge and the lead wire. In this study, it was necessary to provide a very thin film as a connecting media between the strain gauge and the lead wire. For this purpose, "sputtering" and "parallel-gap welding" methods were used. In order to evaluate the results, voltage-current relationship was used as the generic function instead of measuring strength the traditional quality characteristic.
