Process-Structure-Property Study on CP-Ti Produced via High Deposition AM Laser-Hot Wire
Abstract
Commercial Purity CP-Ti (Grade 2) produced via conventional casting techniques is a workhorse material that is used in a variety of DoD and commercial applications. The advent of additive manufacturing (AM) provides the opportunity to deposit materials for local repairs as well as build larger volumes depending on the type of AM process (e.g. PBF vs. DED). In particular, the availability of certain Directed Energy Deposition (DED) additive manufacturing wire-fed approaches (e.g. Sciaky, Laser Hot Wire (LHW)) can provide build rates of 15-20 lbs./hour. This work will conduct a systematic study of LHW-processed Grade 2 CP-Ti in a variety of build conditions relevant to a number of naval applications where conventionally cast CP-Ti is typically used or is being considered for use. LHW processing will be used to prepare both bulk and thin-wall deposits of different thickness in order to determine the effects of changes in LHW parameters on the resulting microstructure (grain/colony size) and properties (hardness, tension, toughness). Test specimens will be excised from the bulk samples in order to provide a direct comparison to thin-wall samples deposited to the same thickness but experiencing different thermal conditions. The extensive experience and existing collaborations of the PI in these areas provides an excellent background to ensure rapid progress on these novel AM processing approaches. The project will support a graduate student, the PI, and laboratory costs to examine the microstructure and mechanical properties of Grade 2 CP-Ti produced via the LHW AM technique.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 27, 2018
- Source ID
- N000141812652
Entities
People
- John J. Lewandowski
Organizations
- Case Western Reserve University
- Office of Naval Research
- United States Navy