EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS
Yıl: 2019 Cilt: 7 Sayı: 1 Sayfa Aralığı: 146 - 153 Metin Dili: İngilizce DOI: 10.15317/Scitech.2019.188 İndeks Tarihi: 21-06-2020
EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS
Öz: The effect of heat-treatment on phase relationships, microstructures and hardness of CoCr-Mo alloys were investigated in detail. The samples were produced by investment casting techniqueand subsequently solutionized (1240 °C for 4 h) and aged (720 °C for 2, 4, 8 and 16 h). Phase analysis ofthe samples were performed via X-ray diffraction analysis, microstructural examination were done bylight optical and scanning electron microscopy. The microstructures of as-cast and short-time (2 and 4 h)aged samples were composed of FCC γ-Co matrix phase and fine M23C6 (where M= Co, Cr and Mo)precipitates. Increasing the aging time to 8 and 16 h led to partial transformation of FCC γ-Co matrixphase into HCP ε-Co phase. The volume fraction of ε-Co phase increased with increasing aging time.Moreover, hardness of the Co-Cr-Mo samples were significantly enhanced with formation of ε-Co phase.
Anahtar Kelime: Yaşlandırma Süresinin Co-Cr-Mo Alaşımlarının Faz Dönüşümleri, Mikroyapıları ve Sertliğine Etkisi
Öz: Bu çalışmada, ısıl işlemin Co-Cr-Mo alaşımlarının faz ilişkileri, mikroyapıları ve sertliklerine etkisi detaylı biçimde incelenmiştir. Alaşım hassas döküm yöntemiyle üretilmiş, takiben çözeltiye alma (1240 °C’de 4 saat) ve yaşlandırma (720 °C’de 2, 4, 8 ve 16 saat) ısıl işlemi uygulanmıştır. Numunelerin faz analizleri X-ışınları kırınım yöntemiyle, mikroyapıları ise optik ve taramalı elektron mikrokobisi yöntemleriyle incelenmiştir. Dökülmüş haldeki ve kısa süre (2 ve 4 saat) yaşlandırılmış numunelerin mikroyapıları YMK kristal yapısına sahip γ-Co matris fazı ve M23C6 (M= Co, Cr ve Mo) tipi ince karbür çökeltilerinden meydana gelmektedir. Artan yaşlandırma süresi ile birlikte γ-Co matris fazı kısmen ε-Co fazına dönüşmüştür. ε-Co fazının miktarı artan yaşlandırma süresi ile artmıştır. Ayrıca, ε-Co fazının oluşumu alaşımın sertliğini önemli ölçüde arttırmıştır.
Anahtar Kelime: Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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| APA | Keles A, MERTSOY Y (2019). EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. , 146 - 153. 10.15317/Scitech.2019.188 |
| Chicago | Keles Ali,MERTSOY YILMAZ EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. (2019): 146 - 153. 10.15317/Scitech.2019.188 |
| MLA | Keles Ali,MERTSOY YILMAZ EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. , 2019, ss.146 - 153. 10.15317/Scitech.2019.188 |
| AMA | Keles A,MERTSOY Y EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. . 2019; 146 - 153. 10.15317/Scitech.2019.188 |
| Vancouver | Keles A,MERTSOY Y EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. . 2019; 146 - 153. 10.15317/Scitech.2019.188 |
| IEEE | Keles A,MERTSOY Y "EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS." , ss.146 - 153, 2019. 10.15317/Scitech.2019.188 |
| ISNAD | Keles, Ali - MERTSOY, YILMAZ. "EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS". (2019), 146-153. https://doi.org/10.15317/Scitech.2019.188 |
| APA | Keles A, MERTSOY Y (2019). EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi, 7(1), 146 - 153. 10.15317/Scitech.2019.188 |
| Chicago | Keles Ali,MERTSOY YILMAZ EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi 7, no.1 (2019): 146 - 153. 10.15317/Scitech.2019.188 |
| MLA | Keles Ali,MERTSOY YILMAZ EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi, vol.7, no.1, 2019, ss.146 - 153. 10.15317/Scitech.2019.188 |
| AMA | Keles A,MERTSOY Y EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi. 2019; 7(1): 146 - 153. 10.15317/Scitech.2019.188 |
| Vancouver | Keles A,MERTSOY Y EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS. Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi. 2019; 7(1): 146 - 153. 10.15317/Scitech.2019.188 |
| IEEE | Keles A,MERTSOY Y "EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS." Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi, 7, ss.146 - 153, 2019. 10.15317/Scitech.2019.188 |
| ISNAD | Keles, Ali - MERTSOY, YILMAZ. "EFFECT OF AGING TIME ON PHASE TRANSFORMATION, MICROSTRUCTURE AND HARDNESS OF Co-Cr-Mo ALLOYS". Selçuk Üniversitesi Mühendislik Bilim ve Teknoloji Dergisi 7/1 (2019), 146-153. https://doi.org/10.15317/Scitech.2019.188 |
