Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic illustration of keyhole pore formation in aluminum alloys during SLM [92,132]: (a) formation of key hole due to excessive energy, (b) flow of liquid weld metal, (c,d) partial flow of the liquid metal to the keyhole pore, and (e) formation of a power within the keyhole pore. Copyright 2017. Adapted with permission from Elsevier Science Ltd. under the license number—4803720213102 (Figure 1 [132]), dated 7 April 2020.
