2021 journal article

Cryogenic mechanical alloying of aluminum matrix composites for powder bed fusion additive manufacturing

JOURNAL OF COMPOSITE MATERIALS, 55(5), 641–651.

By: J. Hamilton*, S. Ramesh n, O. Harrysson n, C. Rock n & I. Rivero*

co-author countries: United States of America 🇺🇸
author keywords: Aluminum matrix composites (AMCs); cryomilling; additive manufacturing feedstock
Source: Web Of Science
Added: October 5, 2020

Cryogenic mechanical alloying (cryomilling) was employed to fabricate aluminum matrix composite powder feedstock for additive manufacturing. The high energy milling of the powder system induces a homogenous distribution of reinforcement particles in the matrix powder by recurrent fracture and cold welding. In this study, aluminum matrix composite feedstock were produced via different cryomilling techniques at varying compositions, powder charges, and milling times. As-milled powders were characterized for particle size distribution, morphology, and homogeneity. Resultant powder demonstrated varying characteristics correlated to milling parameters. Powder metallurgy samples were also fabricated to understand as-sintered reinforcement distribution and the resultant strengthening. This research provides an indication of cryomilling capabilities to become an effective method for custom alloy powder production for powder bed fusion additive manufacturing.