Effect of the B4C content and the milling time on the synthesis, consolidation and mechanical properties of AlCuMg-B4C nanocomposites synthesized by mechanical milling

Ozkaya S., Canakci A.

POWDER TECHNOLOGY, vol.297, pp.8-16, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 297
  • Publication Date: 2016
  • Doi Number: 10.1016/j.powtec.2016.04.004
  • Journal Name: POWDER TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.8-16
  • Keywords: Nanocomposite, Mechanical milling, Powder metallurgy, AlCuMg alloy, TENSILE PROPERTIES, ALUMINUM-ALLOY, COMPOSITE, MICROSTRUCTURE, BEHAVIOR, COMPRESSIBILITY, DISPERSION, EVOLUTION
  • Karadeniz Technical University Affiliated: Yes

Abstract

In this study, AlCuMg-B4C nanocomposites reinforced with the B4C particles were produced using the mechanical milling and hot pressing method. The AlCuMg-B4C nanocomposite powders were milled for up to 25 h and then hot pressed in vacuum at 560 degrees C and 300 MPa. The microstructure, density, hardness and tensile strength of the AlCuMg-B4C nanocomposites were investigated as a function of the milling time and the B4C content (wt). The results show that the hot pressed density of the AlCuMg-B4C nanocomposites decreased with increasing B4C content and increasing milling time. The unreinforced AlCuMg alloy showed a high relative density of 992%, which is much higher density than that of the AICuMg-15 wt% B4C nanocomposites produced with a milling time of 25 h. The hardness of the hot pressed nanocomposites was significantly higher than that of the hot pressed nanocomposites produced by using the conventional powder metallurgy. AlCuMg-10 wt% of B4C nano composites produced with milling time of 6 h exhibited the highest tensile strength of 332 MPa. (C) 2016 Elsevier B.V. All rights reserved.