Effect of Various Rapid Cooling Treatment on the Structural Properties of Iron Nickel Aliminium Alloy Deposited by Detonation-Gun (D-Gun) Method
Abstract: Iron base alloy such
as iron aluminide (Fe-Al) is known as corrosion resistance material at elevated
temper-ature. Addition of chromium and nickel to the material can increase the
temperature capability. Deposition of Fe38Ni10Al alloy material has been done
by using D-Gun method on Stainless Steel substrate. One of the char-acteristics
should be evaluated is the crystalline structural properties of the alloy. It
is known that nanocrystalline or amorphous structure is preferable as they are
able to increase the mechanical properties. Rapid cooling treat-ment of the
alloys from its molten state is done to give different chemical and mechanical
properties, to achieve nanocrystalline structure. This treatment was carried
out by rotating the substrate and simultaneously rotating and spraying
distilled ice-water to the substrate throughout the deposition process. From
the XRD pattern of the deposited alloys, there can be seen the occurrence of
phase transformation compared to as-received alloy. The γ -(Fe,Ni), F eN i 3
and Al phase of as-received alloy were changed into only γ -(Fe,Ni) phase of
deposited alloys. The apparent crystal size evaluated by Scherrer Method was in
nanometer scale size. The successive spraying of distilled ice-water gives
effect on the decrease of crystal size of the deposited alloy (37.78 nm) as compared
to non-sprayed deposited alloy (56.80 nm).
Author: Masbah R.T. Siregar,
Gerald E. Timuda, Farid W. Machmud, and Muchiar
Journal Code: jpfisikagg110011
