Diş hekimliği uygulamalarında kullanılan Co-24,7Cr-5,4W-5Mo-Si alaşımının eklemeli imalat yöntemi ile üretilmesi ve karakterizasyonu


AYGUL E., YALÇINKAYA S. , ŞAHİN Y.

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, vol.37, no.2, pp.571-580, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.17341/gazimmfd.672469
  • Title of Journal : Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi
  • Page Numbers: pp.571-580
  • Keywords: Co-Cr-Mo, additive manufacturing, biomaterials, microstructure, BIOMEDICAL ALLOY, BIO-CORROSION, IMPLANTS

Abstract

In this study, additive manufacturing technique was preferred to produce Wolfram (W), Silicon (Si), and Molybdenum (Mo) doped Co-Cr biomedical alloy. In biomedical applications, the alloy consisting of Wolfram (W), Silicon (Si), Molybdenum (Mo), Chromium (Cr), and Cobalt (Co) elements as known for its high wear and good corrosion resistance. Two group of Co-Cr-Mo alloys were produced using the Selective Laser Melting (SLM) method, one of the additive manufacturing manufacturing techniques. One of the produced samples was then subjected to a secondary heat treatment process. The microstructures of the produced alloys were investigated using X-Ray diffractometry (XRD), Energy dispersive X-Ray analysis (EDX) and scanning electron microscope (SEM). Then, the mechanical properties of the alloys were analyzed by electrochemical corrosion test, microhardness test and Archimedes principle density measurement were the final tests. The data obtained as a result of the analyzes showed that a homogeneous microstructured Co-Cr-Mo alloy was produced by the additive manufacturing production technique. In addition, heat treatment caused serious changes on the microstructure and mechanical properties of the material. The most important of these changes was the reduction of the grains forming the alloy, resulting in an increase in the microhardness value of the alloy.