Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 607, Issue -, Pages 427-434Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.04.019
Keywords
Laser additive manufacturing; Titanium alloy; Microstructure; Heat affected zone; Mechanical properties
Categories
Funding
- State Key Basic Research Program of China [2011CB606305]
Ask authors/readers for more resources
The hybrid fabricating technique by laser additive manufacturing provides an attractive potential for manufacturing titanium alloy components. Microstructure, micro-hardness and room tensile mechanical properties of hybrid fabricated TC11 titanium alloy sample were examined. Results show that the hybrid manufactured sample consists of three typical zones: the laser additive manufactured zone (LAMZ), the wrought substrate zone (WSZ), and the bonding zone without any metallurgical defects. Superfine basket-wave microstructure forms in LAMZ and heat affected zone (HAZ) due to the rapid cooling rate. No obvious grain growth or recrystallization occurs in the HAZ. A special bimodal microstructure consisting of coarse fork-like primary a and fine p transformed microstructure is found in the transition zone due to the heat effect in alpha+beta region. The hybrid fabricated TC11 sample has good mechanical properties with tensile strength of 1033 +/- 13 MPa and elongation of 6.8 +/- 0.2%. The fracture of hybrid sample occurs in the substrate in tensile testing, meaning that the bonding zone has better mechanical properties than the substrate. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available