PMID- 33153041
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201114
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 13
IP  - 21
DP  - 2020 Nov 3
TI  - Estimation Method of Interpass Time for the Control of Temperature during a 
      Directed Energy Deposition Process of a Ti-6Al-4V Planar Layer.
LID - 10.3390/ma13214935 [doi]
LID - 4935
AB  - Directed energy deposition (DED) provides a promising additive manufacturing 
      method to fabricate and repair large metallic parts. However, it may suffer from 
      excessive heat accumulation due to a high build rate, particularly during a wire 
      feeding-type DED process. The implementation of interpass time in between two 
      depositions of beads plays an important process role to passively control the 
      interpass temperature. In this study, a method to estimate the proper interpass 
      time using regression analysis from heat transfer finite element analysis is 
      proposed for maintaining the interpass temperature during a wire feeding-type DED 
      deposition of a planar layer. The overlapping beads of a planar layer are 
      estimated using a polygonal-shaped bead profile in the finite element model. From 
      the estimated proper interpass time, a selected proper interpass time scheme 
      (PITS) is suggested for practical implementation. The selected PITS is applied in 
      a thermo-mechanical finite element model to evaluate the temperature distribution 
      and its effects on the depth of the melt pool, the depth of the heat-affected 
      zone (HAZ), displacement, and residual stresses. By comparing the predicted 
      results with those using a constant interpass time scheme (CITS), the selected 
      PITS shows better control in reducing the depths of the melt pool and HAZ without 
      severely inducing large displacement and residual stresses.
FAU - Chua, Bih-Lii
AU  - Chua BL
AUID- ORCID: 0000-0003-0134-2611
AD  - Faculty of Engineering, Universiti Malaysia Sabah, Kota Kinabalu 88400, Malaysia.
FAU - Ahn, Dong-Gyu
AU  - Ahn DG
AUID- ORCID: 0000-0002-2111-300X
AD  - Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, 
      Dong-gu, Gwangju 61452, Korea.
LA  - eng
GR  - NRF-2019R1A2C1006741/National Research Foundation of Korea/
PT  - Journal Article
DEP - 20201103
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC7662936
OTO - NOTNLM
OT  - Ti-6Al-4V
OT  - additive manufacturing
OT  - directed energy deposition
OT  - interpass time
OT  - planar layer
OT  - thermal stress
OT  - thermo-mechanical analysis
COIS- The authors declare no conflict of interest.
EDAT- 2020/11/07 06:00
MHDA- 2020/11/07 06:01
PMCR- 2020/11/03
CRDT- 2020/11/06 01:01
PHST- 2020/09/22 00:00 [received]
PHST- 2020/10/30 00:00 [revised]
PHST- 2020/10/30 00:00 [accepted]
PHST- 2020/11/06 01:01 [entrez]
PHST- 2020/11/07 06:00 [pubmed]
PHST- 2020/11/07 06:01 [medline]
PHST- 2020/11/03 00:00 [pmc-release]
AID - ma13214935 [pii]
AID - materials-13-04935 [pii]
AID - 10.3390/ma13214935 [doi]
PST - epublish
SO  - Materials (Basel). 2020 Nov 3;13(21):4935. doi: 10.3390/ma13214935.