Department of Mechanical Science and Engineering, Hiroshima University

Outline and Purpose in our laboratory

Find out the causes of things failure/breaking！
Predict the life of things with high accuracy！

The sophistication in the machine industry cannot be acchieved without the development of new materials and the increase in strength of conventional materials.
Our laboratory aims to achieve the development of materials with higher strength properties by investigating the damage mechanism of a wide range of materials, furthermore to develop an innovative surface treatment method that can exhibit higher strength properties.
It is possible to develop new materials with high resistance to damage by carefully observing extremely small area damage with various observation devices such as an ultra-high resolution atomic force microscope and associating it with crystal orientation information around the damaged part. In addition, for thin plate joints joined by various joining methods (resistance spot welding, laser welding, friction stirring joining, adhesive joining) that are widely used in automobile manufacturing, damage due to repeated loading is observed by unique three-dimensional observation method. These approaches can elucidate their fracture mechanisms in detail and propose joining methods that exhibit higher strength properties.Furthermore, our laboratory try to evaluate the fatigue characteristics of various advanced materials such as stainless cast steel for hydroelectric power generation, low alloy steel for pressure vessels, and reinforced platinum rhodium alloy, and to establish a highly accurate life prediction method based on the damage mechanism.

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