The effects of friction-stir process parameters on the fabrication of Ti/SiC nano-composite surface layer

Strengthening analyses and mechanical assessment of Ti/Al2O3 nano-composites produced by friction stir processing

“…Since the microstructure and/or the particle distribution would be difficult to reach a completely homogeneous state along the locations within stir zones [4], all the following results are taken from central regions of stir zones. Optical micrographs of Fig.…”

“…The tool was rotated by the machine in contact with work piece surface and advanced in a line along the groove. FSP experiments were carried out on CP-Ti work pieces with and without alumina powder using a fixed rotating and travel speed of 500 rpm and 150 mm/min using an argon gas shrouding system, respectively [4]. In order to investigate the influence of reinforcements on composites properties and to study the strengthening mechanisms, all the samples were divided to 3 different groups.…”

“…It is well known that fine-grained FSP region has higher hardness due to the Hall-Petch mechanism. It has been reported in the literatures relative to FSW/ FSP of Ti [4,16,22] that refinement of the grain size in the stir zones occurs as a result of some restorative processes. The restoration processes include recovery or recrystallization, and they may occur either dynamically (during hot deformation), or statically (following deformation).…”

“…In this context, titanium is of particular interest as a matrix because of its desirable mechanical, physical and chemical properties. Different types of ceramic particles such as TiC [1], Al 2 O 3 [2][3], and SiC [4] have been used to reinforce titanium matrixes. Al 2 O 3 offers a low cost material to achieve high strength, resistance to thermal shocks, great chemical stability and low density.…”

Effect of Welding Speed on Microstructure and Mechanical Properties due to The Deposition of Reinforcements on Friction Stir Welded Dissimilar Aluminium Alloys

“…The impact of particle distribution during number of pass was investigated by various researchers. It was found that the particle distribution was improved by the increasing the passes and the process parameters [6][7][8][9][10]. Jafari et al [11] studied the outcome of CNT on 6mm Cu plates fabricated by friction stir processing by taking the groove size 0.3mm depth and 1.5mm width, and found that there is an enhancement of mechanical properties of the welded joint.…”