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The structural changes of Al-Ti-Fe alloy during mechanical alloying process

Pilarczyk W., Nowosielski R., Nowak M., Kciuk M.

Journal of Achievements in Materials and Manufacturing Engineering

2008

Vol. 29, nr 2

131-138

Purpose: The aim of this paper is to determine the influence of the mechanical milling process on the structure of Al67Ti25Fe8 alloy. Design/methodology/approach: The powders of the Al67Ti25Fe8 alloys were obtained by mechanical alloying method in a planetary Fritsh Pulverisette 5 mill. In order to investigate the structure scanning electron microscopy were used. Phase transformations were determined by means of diffractometer. The cross-sectional microstructure evolution and element distribution of Al67Ti25Fe8 powder alloys were investigated using backscattering electrons of SEM. The distribution of powder particles was determined by a sieve analysis. Findings: The laboratory test show that, by using the mechanical alloying method, one can produce Al67Ti25Fe8 alloys with intentional chemical constitution and desirable structure. Inside the milling materials didn't find some impurities and undesirable phases. Research limitations/implications: Property of Al67Ti25Fe8 alloys correction is possible by refinement of grains and modification of phases composition. All of the presented experiments in this article are made on a laboratory scale. Continuation of the investigations in the field of sintering alloyed powders to obtained massive materials is foreseen. Practical implications: In the nearest future the producing of bulk materials characterized by better properties in comparison with traditional materials will take place not only in the laboratory scale and move to the industry. Originality/value: : In addition a good microstructural homogeneity and first of all mechanical properties was achieved, also practical application will be possible. The Al-Ti-Fe alloys have been considered to be potentially important for applications at high temperature by reason of their low density end expected high specific strength.

Structure and properties of Al67Ti25Fe8 alloy obtained by mechanical alloying

Pilarczyk W., Nowosielski R., Jodkowski M., Labisz K., Krztoń H.

Archives of Materials Science and Engineering

2008

Vol. 31, nr 1

29-32

Purpose: The goal of this work is to investigate structure and properties of powdersAl₆₇Ti₂₅Fe₈ alloys obtained by mechanical alloying. Design/methodology/approach: The powders of the Al₆₇Ti₂₅Fe₈ alloys were obtained by mechanical alloying method in a planetary Fritsh Pulverisette 5 mill. The changes of the constitution phases were tested by means of the X-ray diffractometer. The microscopic observation of the shape and size of the powdered material particles was carried out by the scanning electron microscope. The cross-sectional microstructure evolution and element distribution of Al₆₇Ti₂₅Fe₈ powder alloys were investigated using backscattering electrons of SEM. The distribution of powder particles was determined by a sieve analysis. Findings: The laboratory test shows that, by using the mechanical alloying method, one can produce powder of Al₆₇Ti₂₅Fe₈ alloys with intentional chemical constitution and desirable structure. Neither impurities nor undesirable phases were observed inside the milled materials. Research limitations/implications: Using refinement of grains and phase modification it is possible to improve properties of Al₆₇Ti₂₅Fe₈ alloy. All of the presented experiments in this article are made on a laboratory scale. It is intended to develop this laboratory scale technology of production materials with better properties then traditionally cast materials in order to bring it into full production in industry. Originality/value: In addition a good microstructural homogeneity end first of all mechanical properties was achieved, also practical application will be possible. The Al-Ti-Fe alloys have been considered to be potentially important for applications at high temperature owing to their low density end expected high specific strength.