Structural Characterization and Its Physical Properties of Non-standard A1 Austenite Steel

Abstract

New austenite stainless steel code-named A1 has been synthesized using the foundry method. The steel was prepared using mineral elements extracted from crude ores in Indonesian mines and commercial scrap materials, in this case ferro scrap, ferro chrome, nickel, manganese, and ferro silicon; all of them were in the granular shape. The starting materials are inserted into an induction foundry furnace that operates on an electromagnetic inductive-thermal system. Moreover, a small quantity of titanium was added to this austenite steel that already has a very low carbon content. The neutron diffraction pattern shows that the material had an fcc crystal structure with lattice parameter of 3.5935 A. Neutron diffraction residual stress and texture measurements were performed on the austenite samples. The residual stress along the [220] crystallographic direction in the A1 alloy is compressive except in the normal direction where it is tensile. Tension as high as -629 MPa was observed in both the axial, transversal and normal directions. No region of high pole densities has been found in the material indicating a weak texture. The average value of the observed hardness is around of 205 on the Vickers scale for original casting sample; and the average hardness value of