Low-velocity impact behavior of Al 6061/SiC particulate metal matrix composites

Abstract

This study addresses the effects of impact velocity (impact energy) and particle volume fraction and particle size on the impact behavior of particle-reinforced metal matrix composites (Al 6061/SiC). Their effects on the contact force and plastic dissipation histories, the residual stress, and plastic strain distributions were also analyzed. The impact velocity and particle volume fraction and particle size were found to have a significant effect. The contact forces and durations increased significantly with increasing impact velocity. The predicted peak contact forces were in minimal errors for lower impact velocities, whereas the predicted impact durations were slightly longer. The composite structures become stiffer when the particle volume fraction is increased. Consequently, the contact force was increased, whereas the impact durations were shortened. However, a larger particle size resulted in lower contact forces, but longer impact durations. Particle reinforced composites can dissipate more kinetic energy in case the particle volume fraction decreases and the particle size increases. Increasing impact velocity and particle volume fraction increased residual stress levels and the plastic strain. Increasing the particle size resulted in the residual stress distributions to become non-uniform but increases in the plastic deformations.

Parti̇kül Takvi̇yeli̇ Metal Matri̇sli̇ Kompozi̇tleri̇n Darbe Davranişlari Üzeri̇ne Bi̇r Derleme

“…Sıcaklığın partikül takviyeli metal matrisli kompozitlerin darbe davranışları üzerindeki etkisinin incelendiği ilk çalışmalardan biri Surappa ve Sivakumar [27] Ekici ve Kaburcuk [38], toz metalürjisi yolu ile üretmiş oldukları Al 6061 matrisli SiC takviyeli kompozitlerin darbe davranışlarının darbe hızı, takviye partikül oranı ve boyutu ile nasıl değiştiğini incelemişlerdir. Hacimce %10, 20, 30 oranında ortalama 37, 102, 356 μm boyutlarında SiC kullanılan çalışma deneysel olarak yapılmanın yanı sıra ABAQUS/Explict paket programı ile de modellenmiş ve sonuçlar deneysel sonuçlar ile karşılaştırılmıştır.…”

“…Buna paralel olarak, tekrarlı darbenin partikül takviyeli kompozitlerin enine merkezi deformasyonlarda azalma ve darbe absorbe etme kabiliyetlerinde düşüşe neden olduğu gözlenmiştir. Ekici ve Kosedag [40], SiC ve Pomza partikülleri ile takviye edilmiş Al esaslı metal matrisli kompozitlerin düşük hızlı darbe davranışlarını sonlu elemanlar yöntemini kullanarak incelemişler. Pomza partikül takviyeli kompozitlere göre SiC partikül takviyeli metal matrisli kompozitlerin düşük hızlı darbe altında daha rijit bir davranış sergilediği belirtilmiştir.…”

Modelling of tribological responses of composites using integrated ANN-GA technique

“…1 Discontinuous particle reinforced aluminum matrix composites (DPAMCs) possess superior strength, high wear resistance and compressive strength, and better thermal stability over matrix alloys. 2–4 7XXX series impart highest strength-to-weight proportion, 5 and AA7075 alloy specifically is vastly applied by aviation industries for manufacturing aircraft structural components for their improved compressive strength and fatigue resistance properties. 6,7 Conventional routes for composite preparation comprise either powder metallurgy or varied kinds of liquid metallurgy methods.…”

Experimental analysis on tribo-performance of aluminum composites

“…1 Discontinuous particle reinforcement-based aluminum matrix composites (PAMCs) are one of the most sought-after materials in defence, automobile, aerospace, mining, and mineral sectors for their superior strength per weight ratio, compressive strength, and thermal stability to that of their matrix alloys. [2][3][4] PAMCs are favored in industries due to their isotropic characteristic, cost-effective mass production even of complex-shaped components in comparison to AMCs of continuous fibre reinforcement. 5 Reinforcing ductile matrix of Al alloy with harder and stiffer second-phase ceramic particulates yields in achieving superior concoction of mechanical and physical properties of metallic matrix as well as reinforcements.…”