2021 Fiscal Year Final Research Report
Development of evaluation device of solidification cracking in metal additive manufacturing and establishment of crack prevention conditions
Project/Area Number |
19K14869
|
Research Category |
Grant-in-Aid for Early-Career Scientists
|
Allocation Type | Multi-year Fund |
Review Section |
Basic Section 18020:Manufacturing and production engineering-related
|
Research Institution | Tokyo Metropolitan Industrial Technology Research Institute |
Principal Investigator |
Chiba Hiroyuki 地方独立行政法人東京都立産業技術研究センター, 事業化支援本部技術開発支援部製品化技術グループ, 副主任研究員 (30757373)
|
Project Period (FY) |
2019-04-01 – 2022-03-31
|
Keywords | Additive Manufacturing / 金属積層造形 / 凝固割れ / 熱間割れ / solidification cracking |
Outline of Final Research Achievements |
We have developed a device for evaluating the susceptibility of solidification cracks to occur when metal powder melted by laser irradiation solidifies in metal additive manufacturing. By using this evaluation device, it was possible to obtain stress and strain when solidification cracks occur. In addition, the susceptibility to solidification cracking under arbitrary fabricating conditions was evaluated. In this verification, the occurrence of various cracks other than solidification cracks was also confirmed. This research, we have found fabricating conditions that balance fabricating quality and prevention of fabricating cracks.
|
Free Research Field |
金属積層造形
|
Academic Significance and Societal Importance of the Research Achievements |
金属積層造形の分野において、造形現象を捉える上で、造形中の温度や変形、応力を定量的に評価することは重要である。しかし、金属積層造形で割れが発生する際の亀裂周辺の応力やひずみを測定した例はなく、開発した装置での造形割れ発生時の応力やひずみ取得手法は学術的意義が高い。また、金属積層造形での凝固割れを防止することで、今まで造形時に凝固割れが発生するため使用できなかった粉末材料が使用できるなり、より高付加価値な製品を創出できるようになる。よって、社会的意義も高いと考える。
|