Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 774, Issue -, Pages 425-433Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.10.052
Keywords
In situ nanosized TiCp; Al nanocomposites; High-temperature tensile properties
Categories
Funding
- National Natural Science Foundation of China (NNSFC) [51571101, 51771081]
- Source Innovation Plan of Qingdao City, China [18-2-2-1-jch]
- Science and Technology Development Program of Jilin Province, China [20170101178JC]
Ask authors/readers for more resources
In situ TiCp/Al-Cu-Mg-Si nanocomposites were prepared in Al-Ti-C systems with different carbon sources (pure carbon black, mixed carbon source (50 wt% CNTs + 50 wt% carbon black) and pure CNTs) via a combination of the combustion synthesis, hot press and hot extrusion methods. The in situ TiCp/Al-Cu-Mg-Si nanocomposites synthesized by the mixed carbon source obtained the most uniform distribution of nanosized TiCp, highest yield strength (sigma(0.2)) and tensile strength (sigma(UTS)) and best fracture strain (epsilon(f)). The 30 vol% TiCp/Al-Cu-Mg-Si nanocomposite synthesized by the mixed carbon source showed superior sigma(0.2) (217 MPa), sigma(UTS) (251 MPa), and epsilon(f) (17.7%) at 533 K, which were respectively 4.3%, 4.1% and 136% higher than those of the nanocomposite synthesized by pure C black (208 MPa, 241 MPa and 7.5%) and respectively 3.8%, 1.6% and 88.3% higher than those of the nanocomposite synthesized by pure CNTs (209 MPa, 247 MPa and 9.4%). The superior high-temperature tensile strength and ductility of the nanocomposites prepared by the mixed carbon source were attributed to the homogeneous distribution of nanosized TiCp. The strengthening of the nanosized TiCp and theta' precipitates was the main strengthening mechanism of the in situ TiCp/Al-Cu-Mg-Si nanocomposites at high temperatures. (C) 2018 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