In situformation of TiC–(Ti–6Al–4V) composites

Abstract

Titanium based alloys offer significant opportunities for weight reduction in aerospace design and more recently it has been considered that particle reiriforced titanium based composites will provide the most practical solutions in this field. In the present paper it is identified that it is possible to produce an in situ TiC- composite via a blended elemental reaction powder metallurgical route. The effect of process parameters on the microstructure and on the presence of possible contaminants and undesirable phases is also examined.MST/3417

Microstructure and mechanical properties of TiC/Ti–6Al–4V composites processed by in situ casting route

“…4 b . Similar results were reported by Jiang,10 Riaz and Flower27 and Hu et al ,33 and it was inferred that the C deficiency in substoichiometric TiC particles is the driving force of Ti precipitation. X-ray diffraction analysis in the section on ‘X-ray diffraction analysis’ indicates that the C content of solidified TiC is obviously lower than the equilibrium composition of TiC at the heat treatment temperature, which corresponds to the composition condition of Ti precipitation.…”

“…Discontinuous reinforced TMCs are conventionally produced by solid9 – 14 or liquid state processes,15 – 19 and the whisker or particle reinforcements are added by ex situ or in situ route. Blended elemental powder metallurgy is the most popular solid state process to fabricate discontinuous reinforced TMCs, and many researches have been conducted using this technique 9 9,10. Compared with solid state processes, the liquid state processes for TMCs have the advantages of faster processing rate, large scale production, low cost and flexibility.…”

Çok Duvarlı Karbon Nanotüp Takviyeli Düzenli/ Düzensiz Şekilli Ti-6Al-4V Kompozitlerin Aşınma Davranışlarının İncelenmesi

“…Ağırlıkça % 6 Alüminyum ve %4 Vanadyum içeren Ti-6Al-4V alaşımı, ısıl işlem kabiliyeti, yeterli mekanik dayanımı, iyi korozyon direnci ve biyouyumluluk gibi özellikleri nedeniyle uçak, türbin ve cerrahi implantlarda kullanılmaktadır [2,3]. Titanyum alaşımları, mükemmel mekanik özelliklere, paslanmaz çelikten daha yüksek özgül mukavemete ve paslanmaz çelikten daha iyi korozyon direncine sahip oldukları için birçok endüstriyel alanda tercih sebebi olmaktadır [4]. Metal Matrisli Kompozitler (MMK) gibi çeşitli kompozit malzemelerin üretiminde de toz metalürjisi yöntemi kullanılmaktadır [5,6].…”

Microstructural characterization of Y2O3 in in situ synthesized titanium matrix composites

“…Over the past few years particle reinforced titanium MMCs have been produced using various techniques, particularly using powder metallurgy [1,2] and liquid phase (casting) [3] processing routes. In recent years, novel processing techniques [4][5][6][7][8][9][10][11][12][13][14][15] based on the in situ production of MMCs have emerged. In situ techniques are valuable to fabricate Ti MMCs with better properties because they overcome the shortcoming of traditional techniques.…”