| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
|
|---|
| Outline of Final Research Achievements |
Several welding techniques were studied to retain the microstructure and the mechanical properties of the base metal after welding.
Resistance spot welding with an insert material was developed to join Mg alloy plates. Using an Mg-Zn-Y alloy plate as an insert material, it was found that high strength joints were obtained at relatively low welding current. Microstructure observations revealed that the long period stacking ordered structure, which was thought to be one of the reinforcing phases of Mg-Zn-Y alloy, precipitated at the welded region and attributed to the high strength properties of the joint. Ultrasonic welding between an Al ribbon and a glass substrate was studied and the effect of the nano structure materials inserted at the bonded interface on the Al microstructure was evaluated. It was revealed that the Al grains became finer but retained the original orientation.
|
