TY - JOUR
T1 - Microtexture in additively manufactured Ti-6Al-4V fabricated using directed energy deposition
AU - Waryoba, D. R.
AU - Keist, J. S.
AU - Ranger, C.
AU - Palmer, T. A.
N1 - Funding Information:
The material is based upon work supported by the Office of Naval Research through the Naval Sea Systems Command, United States, under Contract no. N00024-02-D-6604 , Delivery order No. 0611 . Special thanks to Dr. Billy Short, Dr. William Frazier, Dr. Madan Kittur, Ms. Malinda Pagett, and Mr. Anthony Zaita for their helpful discussions and recommendations. We also acknowledge Karen Taminger for the fabrication of the EB DED wall structures, and Mr. Jay Tressler and Mr. Griffin Jones for fabrication of the lased based DED wall structures. In addition, we acknowledge Mr. Ed Good for use of his metallurgical laboratory. Funding by the Powder Metal Initiative (PMI) through the Pennsylvania Department of Community and Economic Development ( DCED ), Grant # C-000063072 , and that of the Engineering Technology and Commonwealth Engineering ( ETCE ), Pennsylvania State University , is also gratefully acknowledged.
Funding Information:
The material is based upon work supported by the Office of Naval Research through the Naval Sea Systems Command, United States, under Contract no. N00024-02-D-6604, Delivery order No. 0611. Special thanks to Dr. Billy Short, Dr. William Frazier, Dr. Madan Kittur, Ms. Malinda Pagett, and Mr. Anthony Zaita for their helpful discussions and recommendations. We also acknowledge Karen Taminger for the fabrication of the EB DED wall structures, and Mr. Jay Tressler and Mr. Griffin Jones for fabrication of the lased based DED wall structures. In addition, we acknowledge Mr. Ed Good for use of his metallurgical laboratory. Funding by the Powder Metal Initiative (PMI) through the Pennsylvania Department of Community and Economic Development (DCED), Grant # C-000063072, and that of the Engineering Technology and Commonwealth Engineering (ETCE), Pennsylvania State University, is also gratefully acknowledged.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/9/12
Y1 - 2018/9/12
N2 - The additive manufacturing (AM) of α + β titanium alloys using electron beam (EB) and laser directed energy deposition (DED) processes has been widely characterized in both the as-deposited and post processed conditions. Fine basket weave α lath structures are commonly observed in both the as-deposited and post processed hot isostatically pressed (HIP) conditions for both laser and EB DED processes, but more in-depth knowledge of the crystallographic texturing and variant selection of the α laths growing from the primary β-grains across the height of EB DED Ti-6Al-4V structures is not well established. At locations near the substrate in both conditions, microtexturing is weak, but EB DED builds exhibit a strong microtexture and pronounced variant selection with increasing build height. On the other hand, the laser DED builds displayed weak texturing and no prominent variant selection across all heights. With the addition of HIP post processing, there was no change in microtexturing of the coarsened α laths for both the laser and EB structures, and the same variant selection observed in the as-deposited EB DED builds was present.
AB - The additive manufacturing (AM) of α + β titanium alloys using electron beam (EB) and laser directed energy deposition (DED) processes has been widely characterized in both the as-deposited and post processed conditions. Fine basket weave α lath structures are commonly observed in both the as-deposited and post processed hot isostatically pressed (HIP) conditions for both laser and EB DED processes, but more in-depth knowledge of the crystallographic texturing and variant selection of the α laths growing from the primary β-grains across the height of EB DED Ti-6Al-4V structures is not well established. At locations near the substrate in both conditions, microtexturing is weak, but EB DED builds exhibit a strong microtexture and pronounced variant selection with increasing build height. On the other hand, the laser DED builds displayed weak texturing and no prominent variant selection across all heights. With the addition of HIP post processing, there was no change in microtexturing of the coarsened α laths for both the laser and EB structures, and the same variant selection observed in the as-deposited EB DED builds was present.
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U2 - 10.1016/j.msea.2018.07.098
DO - 10.1016/j.msea.2018.07.098
M3 - Article
AN - SCOPUS:85050812362
SN - 0921-5093
VL - 734
SP - 149
EP - 163
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -