金属発泡体の気泡を溶かさずに溶接する方法を発見(Researchers Find Way to Weld Metal Foam Without Melting Its Bubbles)

ad

2023-12-14 ノースカロライナ州立大学(NCState)

金属発泡体の気泡を溶かさずに溶接する方法を発見(Researchers Find Way to Weld Metal Foam Without Melting Its Bubbles)

◆ノースカロライナ州立大学の研究者は、複合金属フォーム(CMF)の部品を溶接する新しい手法を開発しました。通常の溶接技術ではCMFの特性が損なわれるが、誘導溶接法は電磁誘導コイルを使用し、深く浸透するためCMFの特性を保持しながら効果的に溶接できるとしています。
◆CMFは軽量で強力で高温に対する断熱性があり、飛行機やアーマーなど広範な用途が期待されています。新しい溶接法により、CMFの特性を損なわずに複数のコンポーネントを結合できるため、さまざまな分野での利用が進む可能性があります。

<関連情報>

多孔質金属と金属発泡体の溶接に関する研究 A Study on Welding of Porous Metals and Metallic Foams

Afsaneh Rabiei, John Cance, Zubin Chacko
Advanced Engineering Materials  Published: 16 November 2023
DOI:https://doi.org/10.1002/adem.202301430

Abstract

Metal foams are lightweight materials with exceptional impact energy absorption and unique thermal properties. Integrating these novel materials into large structural components requires developing appropriate welding techniques that preserve their bulk performance. Traditional fusion welding methods are ill-suited for metal foams due to their porous structure, which tends to be filled during welding, compromising performance. This study focuses on solid-state welding techniques, including friction stir welding (FSW) and induction welding, to join metal foams without adversely affecting their cellular structure. The results reveal challenges with FSW; it generates excessive heat during welding, filling the foam’s porosities and disrupting its cellular structure. In contrast, induction welding is an effective method for joining composite metal foam (CMF) panels without compromising their structural integrity. The matrix between the porosities in CMF facilitates the penetration of eddy current, promoting the induction welding process. The mechanical properties of the weldments are studied through uniaxial tensile tests, while microstructural characterization of the weldment is evaluated using scanning electron microscopy. The results provide insight into the effect of various welding parameters (e.g., welding temperature, workpiece thickness, and welding environment) as well as the suitability and restrictions of such welding methods in joining CMFs.

0705金属加工
ad
ad
Follow
ad
タイトルとURLをコピーしました