Investigation of tribological behavior of AA8011-ZrB2 in-situ cast-metal-matrix composites

Abstract

Aluminium alloy 8011 matrix composites reinforced with different weight percentages of ZrB2 were successfully fabricated using an in-situ casting technique. X-ray diffraction and scanning electron microscopic analyses were performed to examine the presence and distribution of the reinforcements in the composites. Wear tests were performed with the weight percentage of the reinforcement, temperature, load, sliding velocity and sliding distance as the input parameters for the wear rate as response. D3 steel was used as the counterpart. The effects of various factors on the wear rate were analysed using analysis of variances. The optimal combination of the 1500-m sliding distance, 4 % of mass fractions of ZrB2 reinforcement, 200°C temperature, 10 N load and 2 m/s sliding velocity was found to give the minimum wear rate. Keywords: in-situ stir casting, aluminium-matrix composites, wear behavior, design of experiments V~lanku avtorji opisujejo uspe{no izdelavo kompozitov z matrico iz Al zlitine 8011 in oja~ano z razli~no vsebnostjo ZrB2. S pomo~jo spektroskopije uklona rentgenskih`arkov (XRD) in vrsti~ne elektronske mikroskopije (SEM) so dolo~ili dele`in porazdelitev oja~itvene faze v izdelanih kompozitih. Izvedli so tudi teste njihove obrabe v odvisnosti od temperature, obremenitve, hitrosti in razdalje drsenja. Kot protidrsni element so uporabili orodno jeklo D3. Z analizo varianc so dolo~ili vpliv razli~nih faktorjev na hitrost obrabe. Ugotovili so, da je dose`ena najmanj{a hitrost obrabe, ko so razdalja drsenja 1500 m, masni dele`ZrB2 4 %, temperatura 200°C, obremenitev 10 N in hitrost drsenja 2 m/s. Klju~ne besede: in-situ litje s preme{avanjem taline, kompoziti z matrico na osnovi Al zlitine, obstojnost proti obrabi, na~rtovanje eksperimentov

Online acoustic emission measurement of tensile strength and wear rate for AA8011-TiC- ZrB2 hybrid composite

“…Due to the entire wettability between the matrix and the particle components, the unique interfacial properties of the matrix and the reinforcements dictate the characteristics of aluminium metal matrix composites. Furthermore, these characteristics are affected by the intermetallic bonding and adhesion that occurs between the matrix and the components of the particulates [35][36][37][38][39].…”

“…This is due to their ability to improve alloy materials without eroding or degrading their intrinsic character. ZrB2 has a high melting point, great corrosion resistance, and a phenomenal strength mechanism because of the compound's strong covalent bonding [35][36][37][38][39][40][41]. The composites' characteristics will be improved by adding ZrB 2 -Si3N4 reinforcement to aluminum alloy.…”

Synthesis and Characterization of In-Situ AA8011-TiB2 Composites Produced by Flux Assisted Synthesis

“…Sohi et al reinforced AA8011 composite with aluminium coated alumina particle through liquid phase surface melting technique and observed a uniform distribution of alumina particle along with an improved hardness [9]. The influence of zirconium diboride addition on the tribological behaviour of in-situ cast AA8011-ZrB2 composite was investigated by Muthamizh Selvan et al [10,11].…”