PMID- 36013755
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220830
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 15
IP  - 16
DP  - 2022 Aug 16
TI  - Importance of Build Design Parameters to the Fatigue Strength of Ti6Al4V in 
      Electron Beam Melting Additive Manufacturing.
LID - 10.3390/ma15165617 [doi]
LID - 5617
AB  - The fatigue properties of metals resulting from Powder Bed Fusion (PBF) is 
      critically important for safety-critical applications. Here, the fatigue life of 
      Grade 5 Ti6Al4V from Electron Beam PBF was investigated with respect to several 
      build and component design parameters using a design of experiments (DOE). Part 
      size (i.e., diameter), part proximity, and part location within the build 
      envelope were considered. Overall, metal in the as-built condition (i.e., no 
      post-process machining) exhibited a significantly lower fatigue life than the 
      machined surface condition. In both conditions, the fatigue life decreased 
      significantly with the decreasing part diameter and increasing radial distance; 
      height was not a significant effect in the machined condition. Whereas the 
      surface topography served as the origin of failure for the as-built condition, 
      the internal lack of fusion (LOF) defects, exposed surface LOF defects, and rogue 
      defects served as the origins for the machined condition. Porosity parameters 
      including size, location, and morphology were determined by X-ray micro-computed 
      tomography (XCT) and introduced within regression models for fatigue life 
      prediction. The greatest resistance to fatigue failure is obtained when parts are 
      placed near the center of the build plane to minimize the detrimental porosity. 
      Machining can improve the fatigue life, but only if performed to a depth that 
      minimizes the underlying porosity.
FAU - Ghods, Sean
AU  - Ghods S
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
FAU - Schur, Reid
AU  - Schur R
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
FAU - Montelione, Alex
AU  - Montelione A
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
FAU - Schleusener, Rick
AU  - Schleusener R
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
FAU - Arola, Dwayne D
AU  - Arola DD
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
AD  - Department of Mechanical Engineering, University of Washington, Seattle, WA 
      98195, USA.
FAU - Ramulu, Mamidala
AU  - Ramulu M
AUID- ORCID: 0000-0003-0080-161X
AD  - Department of Materials Science and Engineering, University of Washington, 
      Seattle, WA 98195, USA.
AD  - Department of Mechanical Engineering, University of Washington, Seattle, WA 
      98195, USA.
LA  - eng
GR  - N/A/Boeing (United States)/
GR  - N/A/Joint Center for the Deployment of Research on Earth Abundant Materials/
PT  - Journal Article
DEP - 20220816
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC9412696
OTO - NOTNLM
OT  - X-ray computed microtomography
OT  - additive manufacturing
OT  - defects
OT  - electron beam melting
OT  - fatigue
OT  - porosity
OT  - titanium
COIS- The authors declare no conflict of interest.
EDAT- 2022/08/27 06:00
MHDA- 2022/08/27 06:01
PMCR- 2022/08/16
CRDT- 2022/08/26 01:31
PHST- 2022/07/20 00:00 [received]
PHST- 2022/08/06 00:00 [revised]
PHST- 2022/08/11 00:00 [accepted]
PHST- 2022/08/26 01:31 [entrez]
PHST- 2022/08/27 06:00 [pubmed]
PHST- 2022/08/27 06:01 [medline]
PHST- 2022/08/16 00:00 [pmc-release]
AID - ma15165617 [pii]
AID - materials-15-05617 [pii]
AID - 10.3390/ma15165617 [doi]
PST - epublish
SO  - Materials (Basel). 2022 Aug 16;15(16):5617. doi: 10.3390/ma15165617.