Restricted Research - Award List, Note/Discussion Page
Fiscal Year: 2023
203 University of North Texas (142091)
Principal Investigator: Mishra,Rajiv Sharan
Total Amount of Contract, Award, or Gift (Annual before 2011): $ 45,000
Exceeds $250,000 (Is it flagged?): No
Start and End Dates: 8/16/22 - 1/30/23
Restricted Research: YES
Academic Discipline: Materials Science & Engineer
Department, Center, School, or Institute: College of Engineering
Title of Contract, Award, or Gift: Modeling and Process Planning Tool for Hybrid Metal Additive/Subtractive Manufacturing to Control Residual Stress and Reduce Distortion
Name of Granting or Contracting Agency/Entity:
Global Engineering and Materials, Inc.
CFDA Link: DOD
12.431
Program Title:
none
CFDA Linked: Basic Scientific Research
Note:
The University of North Texas (UNT) team will perform experimental study and residual stress characterization under the Phase I program to support GEM’s modeling approach for simulation of the residual stress evolution of Ti-6Al-4V coupons fabricated under a hybrid metal additive/subtractive manufacturing process. The UNT team will fabricate different sets of coupons using laser power bed fusion AM process under various processing parameters. A relatively low temperature heat treatment (thermal soaking) will be performed to reduce the residual stress at the end of the AM process (prior to the machining step). Two NDI techniques based on the DIC and X-ray diffraction will be used to measure the distortion/residual stress (direct or indirect) after each step such as at the end of AM, before removing from the print plate, after removing from the printing plate, after the heat treatment, and after the machining. To monitor the temperature inside the AM chamber, temperature sensors will be mounted on the substrate (printing plate). During the machining process, cutting speed, cutting path, and other parameters will be varied to determine the resulting impact on the final distortion and residual stress.
Discussion: No discussion notes