“…When the heat-treated samples were examined (HT1, HT2, and HT3), it was determined that the elongation value increased with the increase in the heat treatment temperature. It is estimated that this is due to grain coarsening due to increased heat treatment temperature [11].…”
Section: Mechanical Evolutionmentioning
confidence: 99%
“…According to the material's microstructure joined with low heat input, it was determined that grain coarsening of the material joined with high heat input occurred in the weld metal, and the volumetric ratio of the primary α phase in the weld metal increased. It has been reported that the weld metal microstructure of the material, combined with low heat input, consists of basket weave or acicular α' and primary β phases at the grain boundaries [11].…”
In this study, the changes in the internal structure and mechanical properties of laser-welded Ti6Al4V material after heat treatment were experimentally investigated. The transformation temperatures of the α and β phase structures of the Ti6Al4V material influenced the heat treatment temperatures. Optical microscopes, XRD, and SEM experiments were performed to detect the microstructural change. Hardness and tensile tests were also carried out to determine the change in mechanical properties. The experimental study determined that the mechanical properties of laser-welded Ti6Al4V material improved after heat treatment. It was observed that ductility and strength increased significantly at heat treatment temperatures above the β phase temperature. It was determined that the Widmanstatten morphology visible in the weld area increased the hardness.
“…When the heat-treated samples were examined (HT1, HT2, and HT3), it was determined that the elongation value increased with the increase in the heat treatment temperature. It is estimated that this is due to grain coarsening due to increased heat treatment temperature [11].…”
Section: Mechanical Evolutionmentioning
confidence: 99%
“…According to the material's microstructure joined with low heat input, it was determined that grain coarsening of the material joined with high heat input occurred in the weld metal, and the volumetric ratio of the primary α phase in the weld metal increased. It has been reported that the weld metal microstructure of the material, combined with low heat input, consists of basket weave or acicular α' and primary β phases at the grain boundaries [11].…”
In this study, the changes in the internal structure and mechanical properties of laser-welded Ti6Al4V material after heat treatment were experimentally investigated. The transformation temperatures of the α and β phase structures of the Ti6Al4V material influenced the heat treatment temperatures. Optical microscopes, XRD, and SEM experiments were performed to detect the microstructural change. Hardness and tensile tests were also carried out to determine the change in mechanical properties. The experimental study determined that the mechanical properties of laser-welded Ti6Al4V material improved after heat treatment. It was observed that ductility and strength increased significantly at heat treatment temperatures above the β phase temperature. It was determined that the Widmanstatten morphology visible in the weld area increased the hardness.
Bu çalışmanın amacı, titanyum boruların lazer kaynak yöntemi ile birleştirilebilirliğinin araştırılmasıdır. Kaynak işlemleri üç farklı lazer ışın gücünde (130, 140 ve 160 W) gerçekleştirilmiştir. Kaynak işlemleri esnasında ilave metal kullanılmış ve boru sabit hızda döndürülerek, torç yatay pozisyonda konumlandırılmıştır. Birleştirme işlemi yapılan titanyum borulara kaynak işlemi sonunda kaynak kalitesini ve mekanik özelliklerini belirlemek amacıyla, gözle muayene, çekme testi ve sertlik testi yapılmıştır. Ayrıca içyapıdaki kusurların belirlenmesi için kaynak bölgesinin mikroyapı incelemeleri ile SEM (EDS) çalışmaları yapılmıştır. Çekme testleri sonucunda, düşük lazer gücünde birleştirilen numunelerde kopma kaynak metalinden gerçekleşirken, yüksek lazer gücünde birleştirilen kaynaklı numunede kopma kaynak bölgesi dışından gerçekleşmiştir. Kaynaklı numunelere yapılan sertlik testleri sonucunda en yüksek sertlik değerlerinin kaynak metalinde, en düşük sertlik değerlerinin ise ana malzemede olduğu tespit edilmiştir. Anahtar Kelimeler: Titanyum, lazer ışın kaynak yöntemi, kaynak metali.
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