Effect of low frequency vibration on porosity of LM25 and LM6 alloys

Study on the effect of prolonged mechanical vibration on the grain refinement and density of A356 aluminum alloy

“…These alloys exhibit many benefits such as wear and corrosion resistance, hot tearing resistance, good weldability, high strength to weight ratio and excellent castability [1,2]. Therefore, these alloys are suitable for automotive cylinder heads, engine blocks, aircraft components, pipe fitting and military applications [2]. Controlling the microstructure in the casting of components made by these alloys is an important challenge considered by the foundry industries [3].…”

“…Chernov [4] in 1878 might be the first person who used mechanical vibration of mold during solidification of steel and observed that final structure of primary austenite was refined. Other investigators [2][3][4][5][6][7][8][9][10][11][12] have reported considerable effects of vibrational energy such as grain refinement and degassing in the ingot or shape casting processes. Effect of mechanical vibration in pure aluminum, Al-%8Si, LM6 and LM11 alloys was studied by Fisher et al [6].…”

“…There are different reports about effect of mechanical vibration on the density and porosity of Al-Si alloys. Some investigators reported decrease in porosity by application of vibration [9] and in contrast; some investigators reported the increase of porosity [10]. In the all mentioned researches [2][3][4][5][6][7][8][9][10], mechanical vibration was exerted to a solidifying alloy with high cooling rate conditions.…”

Effect of mechanical vibration on the residual stress of direct laser metal deposition workpiece

“…With the operation of mechanical vibration, the melted metal is stirred during solidification. It causes the reducing in the nucleant size and also the changing of growth direction [4] [5]. During the deposition process, the powders were melted by laser and solidified on the attached location.…”

Development and Mechanical Properties Analysis of Aluminum LM14- Mgo Metal Matrix Composite Using FEA

“…The literature review showed that MMCs play a vital role in replacing metals, due to their advanced mechanical and metallurgical properties. A lot of researchers have concentrated on developing new composites such as Al 6061, LM14, LM25 reinforced with various elements such as TiB 2 , SiC, TiC, ZrB 2 , AIN, Si 3 N 4 , Al 2 O 3 and their wear properties were analyzed in earlier studies [4][5][6][7][8][9][10][11][12]. No papers have been found to analyze the effect of MgO on the LM14 base material while subjected to finite element analysis.…”