In a direct-metal deposition (DMD) process used to deposit successive
layers in accordance with instructions from a CAD/CAM program, the laser
beam, or an additional beam, is deployed as a localized heat treatment
tool instead of a deposition tool. The use of laser energy during the
process can minimize, if not eliminate, the periodic heat treatments now
required for stress alleviation, thereby compressing the DMD fabrication
cycle. In the preferred embodiment, every deposition run may be followed
by a dry (i.e., without powder) run of one or more intensities to
manipulate the stress magnitude and location. Since it is well known that
residual stress is a function of cooling rate, a plurality of laser beams
may alternatively be used to control the cooling rate of the deposited
layer. Examples of stress reduction using H13 tool steel are provided.