The role of a low-energy–density re-scan in fabricating crack-free Al85Ni5Y6Co2Fe2 bulk metallic glass composites via selective laser melting

Xiaopeng Li, C.W. Kang, H. Huang, Tim Sercombe

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

In this paper, we have investigated the use of a re-scanning strategy to prevent propagation of macro-cracks during the selective laser melting of an Al85Ni5Y6Co2Fe2 bulk metallic glass composites (BMGCs). These cracks form as a result of the high residual stress caused by the rapid heating and cooling of the material by the laser beam. Unlike crystalline materials, the BMGCs possess a supercooled liquid region in which the residual stress can be relieved by plastic flow. We show that by using a high power initial scan (designed to melt the material) followed by a lower power re-scan (for stress relief) cracking can be prevented. Using this approach, crack-free Al85Ni5Y6Co2Fe2 BMGCs components have been fabricated, including a gear with a diameter ∼25 mm and height ∼10 mm.
Original languageEnglish
Pages (from-to)407-411
Number of pages5
JournalMATERIALS & DESIGN
Volume63
Early online date23 Jun 2014
DOIs
Publication statusPublished - Nov 2014

Fingerprint Dive into the research topics of 'The role of a low-energy–density re-scan in fabricating crack-free Al85Ni5Y6Co2Fe2 bulk metallic glass composites via selective laser melting'. Together they form a unique fingerprint.

Cite this