Treatment is an operation or combination of operations involving typical heating and soaking at a temperature for a period of time and methods. The aim is to obtain a desired predetermined property like hardness. Knowing the hardness of any metal or alloy is important, as this value gives you an indication of its ability to form and maintain a shape and is also a guide to its durability. To ens...

The possibility of changing the dendritic microstructure associated with conventional casting processes hypoeutectic Al-Si alloys to non-dendritic by using controlled diffusion solidification process (CDS) has been investigated. successful CDS depends on mixing two precursor heated at a superheat condition near their respective liquidus temperature. Experimental work and simulation Ansys softwa...

A unique gradient furnace for directional solidification experiments with bulk Al-alloy samples developed at German Aerospace Center is presented. It allows in situ process control solidifying by using x-radiography, and further insight into the gained combination x-ray computational tomography on solidified samples. Tracking of interfaces during via x-radiography (TIREX) enables investigation ...

Abstract We studied the formation and growth of locked-lamellar microstructures in a thin sample slightly hypoeutectic Al-Al 2 Cu alloy. The coupled-growth dynamics, including early stages steady-state regimes, was observed optically real time during directional solidification. orientation α (Al) θ (Al Cu) crystals measured ex situ series eutectic grains by X-ray Laue microdiffraction. A nuclea...

Laser remelting has been performed on Ni-30 wt.% Sn hypoeutectic alloy. An anomalous eutectic formed at the bottom of the molten pool when the sample was remelted thoroughly. 3D morphologies of the α-Ni and Ni3Sn phases in the anomalous eutectic region were obtained and investigated using serial sectioning reconstruction technology. It is found that the Ni3Sn phase has a continuous interconnect...

The article presents the results of a study microstructure rapidly solidified foil hypoeutectic alloy Sn – 4.4 wt. % Zn. It was found that investigated has two-phase structure, which consists solid solutions tin and zinc. Doping with zinc leads to decrease in unit cell parameter. difference between parameters comparison an pure tends during holding, is due strong supercooling melt its productio...

The effect of La addition (0, 0.1, 0.2, 0.4, wt.%) on the microstructure, tensile properties and fracture behavior Al-7Si alloy was investigated systematically. It is found that appears in form Al4La Al2Si2La phases. can refine secondary dendrite arm spacing (SDAS) eutectic Si particles, which are decreased by 7.9% 7%, respectively, with optimal content 0.1wt.%. Because when 0.1wt.% added, a re...