This paper first enlists the generic problems of alloy wheel machining and subsequently details on the process improvement of the identified critical-to-quality machining characteristic of A356 aluminum alloy wheel machining process. The causal factors are traced using the Ishikawa diagram and prioritization of corrective actions is done through process failure modes and effects analysis. Proce...

E. Olejnik, A. Janas, B. Grabowska, M. Kawalec, AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland Casting technology was applied and research was carried out on two alloys based on the Ni3Al phase with variable carbon content of 0,2 and 1,25 wt. % C, respectively. Resistance to abrasive wear, friction coeffi cient and Vickers microhardness were determined....

Previously, high temperature properties of the silver-palladium-copper-gold alloy were investigated. In this study, the thermal expansion percentage and coefficient, and high temperature strengths of ADAS Type 3 gold alloy were investigated up to the liquidus temperature. Furthermore, microstructural and compositional changes in the solid/liquid dual phase were studied. The following conclusion...

Redox conditions in magma oceans (MOs) have a key influence on the mass and composition of Earth’s early atmosphere. If the shallow part of the MO is oxidized, it may be overlain by an H2O–CO2 atmosphere, but if the near-surface magma is close to equilibrium with Fe-rich alloy, then the atmosphere will consist chiefly of H2, H2O, and CO, and on cooling will be rich in CH4. Although MOs are inti...

Abstract The effects of the grain refinement and eutectic Si modification on tensile properties by using Al-B-Sr master alloys in A356 cast alloy were investigated. Two different alloys, Al-4%B-1%Sr (4B1Sr) Al-3%B-3%Sr (3B3Sr), developed. In microstructure observation, consisted AlB 2 , SrB 6 AlSrF, KAlF 4 Al Sr compounds. It should be noted that α-Al phase also exists two alloy. result showed ...

The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for dendritic casting alloys. These heat treatments are not necessarily the optimum treatments. It is shown that a decrease of the solution treatment time at 540 o C from 6 hours to 1 hour does not alter the T4 or T6 tensile properties of the SSM processed A356 alloy. Slightl...

This study examines the effect of heat treatment at three different temperatures of 800 ̊C, 950 ̊C and 1100 ̊C on the microstructure and mechanical properties of low-alloy steel with an addition of manganese, chrome and lead. To determine an impact of the applied heat treatment operations, testing of mechanical properties and microstructural examinations of the steel with 0.23%, 0.24%, 0.29% and 0...

Abstract Shape memory alloys (SMAs), such as Ni–Ti, are promising candidates for actuation and damping applications. Although processing of Ni–Ti bulk materials is challenging, well-established routes (i.e. casting, forging, wire drawing, laser cutting) enabled application in several niche applications, e.g. the medical sector. Additive manufacturing, also referred to 4D-printing this case, kno...

We present a modified semantics and an extension of the Alloy specification language. The results presented in this paper are: (a) We show how the modified semantics of Alloy allows us to avoid the higher-order quantification currently used both in the composition of operations and in specifications, keeping the language first-order. (b) We show how the extended language, which includes feature...