Machining Sequence to Manufacture a γ‐TiAl‐Conrod for Application in Combustion Engines

Abstract

ters after cooling to room temperature. [23] Powder premix: 80 wt% of ultrafine Al (2.5 micron in average) powder, 5 wt% Cu nanopowder (less than 70 nm), and 15 wt% adhesive binder were mixed in 30 ml acetone.Filling: The moulds were filled with the prepared metallic powder paste. When the powder patterns were dry and became solid, the PDMS mould was peeled off.Sintering: The green patterns were placed inside a furnace(Carbolite 2416-tube furnace) filled with Ar gas and heated to 600°C at 5°C/min and then kept for 6 h. The microcomponents were taken out after the furnace was cooled down to room temperature.

High performance cutting of gamma titanium aluminides: Influence of lubricoolant strategy on tool wear and surface integrity

“…Heat resistant intermetallic gamma titanium aluminides (g-TiAl) have been identified as possible alloys for high-performance automotive components [1,2], and they are intended for a wide usage in aerospace applications, especially in the hot parts of aircraft engines [3,4]. This increasing interest can be traced back to the extraordinary material properties, which are not even comparable with conventional titanium-based alloys: low density and therefore favourable strength-to-weight ratio, good oxidation behaviour and thermal stability, limited ductility and fracture toughness below brittle-to-ductile transition, and good creep resistance properties.…”

On high-speed turning of a third-generation gamma titanium aluminide

“…Promising fields of application have been identified both in rotating and non-rotating parts, as low pressure turbines, compressor vanes, swirl nozzles, automotive engine valves and turbocharger wheels [4][5][6]. The relatively low density of the material leads to reduced engine weights, resulting in higher thrust to weight ratios, while its higher operating temperatures at the pressures acting upon them allow to improve the engine efficiency.…”

A Review of Milling of Gamma Titanium Aluminides

“…Most of the research in titanium aluminides machining is conducted using the existent information for titanium Ti-6Al-4V allow, which has been the most extensively studied alloy of the group of titanium alloys. According to several researchers (Aust and Niemann 1999;Aspinwall, Dewes, and Mantle 2005;Beranoagirre, Olvera, and López de Lacalle 2012;Ge, Fu, and Xu 2007;Mantle and Aspinwall 2001;Weinert, Bergmann, and Kempmann 2006), low thermal conductivity, low elastic modulus, high strength and the brittle nature of titanium aluminides are the main factors for their poor machinability. These factors conduct to the rapid degradation of the machining tools, low material removal rate, and low surface quality of machined parts.…”

“…Some researchers have been dedicated to the development of titanium aluminides machinability, where optimization of the integrity surface(Mantle and Aspinwall 2001;Kolahdouz et al 2015;Bentley, Mantle, and Aspinwall 1999;Priarone et al 2016; Priarone, Rizzuti, Rotella, et al 2012;Radkowski and Sep 2014), selection of cutting parameters(Aspinwall, Dewes, and Mantle 2005;Aust and Niemann 1999;Beranoagirre, Olvera, and López de Lacalle 2012;Bruhis, Sebring, and Noland 2008;Priarone, Rizzuti, Settineri, et al 2012;Weinert, Bergmann, and Kempmann 2006), tool wear(Vargas Pérez 2005;Priarone et al 2016; Priarone, Rizzuti, Rotella, et al 2012;Barakchi Fard and Feng 2009;Priarone, Rizzuti, Settineri, et al 2012), machining environment(Priarone et al 2011;Aspinwall et al 2013;Barakchi Fard and Feng 2009), are the main topics focus of research.…”