Wear behaviour of hot rolled AZ31B magnesium alloy as candidate for biodegradable implant material


MERT F.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, cilt.27, sa.12, ss.2598-2606, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Konu: 12
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/s1003-6326(17)60287-5
  • Dergi Adı: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
  • Sayfa Sayıları: ss.2598-2606

Özet

Surface integrity and tribological behaviour of implant materials have a critical impact on their performance in the body. To understand wear behaviour well, the present article focuses on the sliding wear behavior of hot rolled AZ31B magnesium alloy which is a good candidate for biodegradable implant material. Dry-sliding conditions which include pin-on disc method with heat-treated high-carbon steel disc as counterface were used. Wear rates at a fixed sliding distance of 5000 m were measured at sliding velocities of 0.25, 0.5, 1 and 2 m/s, and loads of 10, 20, 40 and 80 N. Microstructure of worn surfaces of pins was characterized using SEM/EDS. Wear mechanism maps of the investigated materials were composed to understand comprehensively. According to test results, abrasive wear occurred at load of 20 N and sliding speed of 0.25 m/s while melting wear was predominant at load of 80 N and sliding speed of 2 m/s. Results show that ultra-severe plastic deformation is the main wear mechanism at the highest applied load and sliding velocity speed for the investigated alloy. Consequently, hot rolled AZ31B magnesium alloy exhibited a good wear resistance due to fine microstructure and high hardness.