TY - JOUR

T1 - An experimental and theoretical investigation of combined gas- and water-atomized powder deposition with a diode laser

AU - Pinkerton, A J

AU - Syed, W U H

AU - Li, L

PY - 2006

Y1 - 2006

N2 - Functionally graded or composite components (FGCs) have been recognized as having immense potential for many industries. So far, deposition of compositionally graded alloys is the only method that has been shown to be a practical way to produce FGCs. In this work, a second way, that allows graded structures of a single material to be formed by direct metal deposition, is investigated. Simple component samples are built using a diode laser direct metal deposition system with a side feed nozzle and blends of water- and gas-atomized 316L steel powder in varying proportions. Trends in surface finish, wall integrity, and overall wall dimensions are immediately apparent. Further analyses using optical microscopy, x-ray diffraction, and mechanical testing methods show that it is possible to produce differences in physical properties such as tensile strength and hardness across a formed component. The system is modeled and the results discussed in terms of the thermal cycle of the build material. (c) 2006 Laser Institute of America.

AB - Functionally graded or composite components (FGCs) have been recognized as having immense potential for many industries. So far, deposition of compositionally graded alloys is the only method that has been shown to be a practical way to produce FGCs. In this work, a second way, that allows graded structures of a single material to be formed by direct metal deposition, is investigated. Simple component samples are built using a diode laser direct metal deposition system with a side feed nozzle and blends of water- and gas-atomized 316L steel powder in varying proportions. Trends in surface finish, wall integrity, and overall wall dimensions are immediately apparent. Further analyses using optical microscopy, x-ray diffraction, and mechanical testing methods show that it is possible to produce differences in physical properties such as tensile strength and hardness across a formed component. The system is modeled and the results discussed in terms of the thermal cycle of the build material. (c) 2006 Laser Institute of America.

KW - laser deposition

KW - spraying

KW - semiconductor lasers

KW - composite materials

KW - stainless steel

KW - surface finishing

KW - optical testing

KW - X-ray diffraction

KW - mechanical testing

KW - diode laser

KW - gas atomized

KW - water atomized

KW - clad properties

U2 - 10.2351/1.2164486

DO - 10.2351/1.2164486

M3 - Journal article

VL - 18

SP - 73

EP - 80

JO - Journal of Laser Applications

JF - Journal of Laser Applications

SN - 1042-346X

IS - 1

ER -