Abstract: Various embodiments include an acoustic-energy deposition and repair system that includes at least one Directed Acoustic Energy Deposition (DAED) tool configured to apply acoustic energy to feedstock material in at least one of three vibrational modes; and a drive system to move the DAED tool in at least one of three-coordinate positions. In various examples, the acoustic-energy deposition and repair system further includes at least one in-situ metrology tool mounted proximal to the DAED tool to measure a grain size of deposited material. Other methods, devices, apparatuses, and systems are disclosed.