When laser power was above this threshold, aluminum alloy powder melted and bonded with the under layer and fest metallurgical bonding formed, model with approx. 100% density can be achieved.

• 当激光功率超过粉末的加工阈值时,粉末与基体之间形成致密的冶金结合,为获得致密度为100%25的铝合金模型提供了可能性。