ISSN: 1999-8716

Keywords : heat treatment


EFFECT OF GLASS ADDITION AND HEAT TREATMENT ON MECHANICAL PROPERTIES AND WEAR RATE OF ALUMINUM - 2% GRAPHITE

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2017, Volume 10, Issue 4, Pages 33-41

This research studied the effect of the Heat Treatment on the Mechanical Properties and the Wear Rate of the pure Aluminum with a particle size of (≤53μm). The Aluminum is reinforced by graphite with a particle size of (≤63μm) with an addition of glass particles with different weight ratios of (3, 6, 9, and 12) Wt. % and a particle size was (≤ 53μm).
Powder metallurgy technique has been used to manufactured the samples, where the samples are pressed uniaxial at room temperature with (500 Map), then sintering at (550 C0) for (2 hr.). After that, heat treatment is applied on the samples at (500 OC) for one hour and Quenched in water.
There was a great improvement of the mechanical properties such as the hardens and the compressive strength. This improvement was proportional with the Weight ratio of the glass particles before and after the Heat Treatment.
On the other hand, there was a decrease of the wear rate versus the increase of the Weight ratio of the glass particles and heat treatment.
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LOW CYCLE FATIGUE BEHAVIOR OF ALUMINUM ALLOYS AA2024-T6 AND AA7020-T6

Zyad Nawaf Haji

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2010, Volume 3, Issue 0, Pages 127-137

ABSTRACT:- In this study low cycle fatigue tests were performed in two aluminum alloys with different chemical composition, namely AA2024-T6 and AA7020-T6 under same heat treatment, using standard round specimens. The tests undertaken in strain control with strain ratio Re = -1.The low cycle fatigue results are used for characterization of the cyclic plastic response and the fatigue life of the alloys. This study revealed that the strength and the different chemical composition have a significant effect on transition fatigue life. The degree of the compatibility and precipitation of elements zinc (Zn) and copper (Cu) on their parent metal lead to obtain higher fatigue properties value in alloy AA7020-T6 than alloy AA2024-T6. Moreover, the cyclic deformation behavior seems to be influenced by the strength and the different chemical composition
Keywords:- Low cycle fatigue, chemical composition, heat treatment.