About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
General Poster Session
|
Presentation Title |
J-140: Influence of Solution Heat Treatment on the Microstructures and Mechanical Properties of TC4 Alloy Prepared by SLM |
Author(s) |
Shifeng Liu, Zhichang Zhang |
On-Site Speaker (Planned) |
Shifeng Liu |
Abstract Scope |
TC4 alloy was prepared by Selective Laser Melting (SLM) with near-full 98.7% density. The microstructures of the sample before and after heat treatment were analyzed. The as-deposited sample showed an epitaxial growth along the building direction. Almost all non-equilibrium fine α' phase was found in the sample.After the solution heat treatment of the TC4 alloy sample, the structure is transformed into the equilibrium phase α and roughened into a strip shape. The mechanical properties of TC4 alloy before and after heat treatment were tested.The tensile strength of the as-deposited samples was 1291±20 MPa, and the plastic elongation was 2.2±0.7%. The fractures showed typical patterns of brittle fractures with river-like and stair-like steps. The tensile strength of the sample after heat treatment decreased by about 200 MPa, the elongation increased by about 10%, and the fracture morphology changed into tiny dimples. |
Proceedings Inclusion? |
Undecided |