Effect of Milling Time and the Consolidation Process on the Properties of Al Matrix Composites Reinforced with Fe-Based Glassy Particles

Metals

Özge Balcı¹  Konda Gokuldoss Prashanth³  Sergio Scudino³  Duygu Aᇺoğulları¹  İsmail Duman¹  M. Lütfi Öveçoğlu¹  Volker Uhlenwinkel²  Jürgen Eckert³  K. C. Chan⁴ 

[1] Particulate Materials Laboratories (PML), Department of Metallurgical and Materials Engineering, İstanbul Technical University, 34469 İstanbul, Turkey; E-Mails:;Institut für Werkstofftechnik, Universität Bremen, D-28359 Bremen, Germany; E-Mail:;Institute for Complex Materials, IFW Dresden, 270116 Dresden, Germany; E-Mails:Particulate Materials Laboratories (PML), Department of Metallurgical and Materials Engineering, İstanbul Technical University, 34469 İstanbul, Turkey;

关键词: metallic glasses;    composites;    powder metallurgy;    mechanical characterization;   

DOI  :  10.3390/met5020669

来源: mdpi

【 摘 要 】

Al matrix composites reinforced with 40 vol% Fe_50.1Co_35.1Nb_7.7B_4.3Si_2.8 glassy particles have been produced by powder metallurgy, and their microstructure and mechanical properties have been investigated in detail. Different processing routes (hot pressing and hot extrusion) are used in order to consolidate the composite powders. The homogeneous distribution of the glassy reinforcement in the Al matrix and the decrease of the particle size are obtained through ball milling. This has a positive effect on the hardness and strength of the composites. Mechanical tests show that the hardness of the hot pressed samples increases from 51–155 HV, and the strength rises from 220–630 MPa by extending the milling time from 1–50 h. The use of hot extrusion after hot pressing reduces both the strength and hardness of the composites: however, it enhances the plastic deformation significantly.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.