TY - JOUR
T1 - Residual stresses and microstructure in Powder Bed Direct Laser Deposition (PB DLD) samples
AU - Song, X
AU - Xie, M
AU - Hofmann, F
AU - Illston, T
AU - Connolley, T
AU - Reinhard, C
AU - Atwood, RC
AU - Connor, L
AU - Drakopoulos, M
AU - Frampton, L
AU - Korsunsky, AM
PY - 2015/4
Y1 - 2015/4
N2 - In the present study, residual stresses in the Powder Bed Direct Laser Deposition (PB DLD) built parts were investigated using X-ray diffraction strain measurement and finite element simulation. The microstructure and texture of the DLD built parts were studied, indicating that the vertically elongated grains have preferred orientation of (001)-type pointing in the growth direction in the nickel superalloy C263. A conceptual model of residual stress generation was proposed using fictitious thermal expansion based on the argument that residual stresses arise from strain incompatibility that is “frozen in” within the work piece during fabrication.
AB - In the present study, residual stresses in the Powder Bed Direct Laser Deposition (PB DLD) built parts were investigated using X-ray diffraction strain measurement and finite element simulation. The microstructure and texture of the DLD built parts were studied, indicating that the vertically elongated grains have preferred orientation of (001)-type pointing in the growth direction in the nickel superalloy C263. A conceptual model of residual stress generation was proposed using fictitious thermal expansion based on the argument that residual stresses arise from strain incompatibility that is “frozen in” within the work piece during fabrication.
KW - Direct Laser Deposition (DLD)
KW - Finite Element (FE) simulation
KW - Residual Stresses (RS)
KW - Simplified conceptual thermal expansion model
KW - Synchrotron X-ray diffraction
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pure_starter&SrcAuth=WosAPI&KeyUT=WOS:000352920300006&DestLinkType=FullRecord&DestApp=WOS
U2 - 10.1007/s12289-014-1163-1
DO - 10.1007/s12289-014-1163-1
M3 - Article
SN - 1960-6206
VL - 8
SP - 245
EP - 254
JO - International Journal of Material Forming
JF - International Journal of Material Forming
IS - 2
ER -