International Journal of Advanced Materials Research
Articles Information
International Journal of Advanced Materials Research, Vol.2, No.3, May 2016, Pub. Date: Apr. 28, 2016
Influence of Heat Treatment on the Microstructure and Mechanical Properties of Hypoeutectic Al-5wt% Si Alloy
Pages: 38-44 Views: 1697 Downloads: 891
[01] E. E. Abdel-Hady, Physics Department, Faculty of Science, Minia University, Minia, Egypt.
[02] A. F. Abd El-Rehim, Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia; Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt.
[03] S. M. Diab, Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt.
[04] Sh. M. Kandeal, Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt.
The present study aimed to investigate the influence of heat treatment on the microstructure and mechanical properties of Al-5wt% Si alloy by positron annihilation spectroscopy and Vickers microhardness measurements. Samples of Al-5wt% Si alloy were treated with a T6 heat treatment, that is, solution treatment at 550C for 2 h, quenching in cold water at 0C, followed by aging at different temperatures for various periods of time. All of the samples were then characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis as well as by hardness tests. The results revealed that the average life time, av, and hardness, Hv, continuously increased with increasing aging temperature at lower aging times (15 and 30 min). At higher aging times (60 and 120 min), both av and Hv decreased with increasing aging temperature. A positive correlation was found between the positron annihilation parameters and the macroscopic mechanical properties through the measurements of Vickers microhardness for the samples. The lattice strain, η, average crystallite size, d, and dislocation density, δ, parameters deduced from the analysis of X-rays diffraction patterns were found to be consistent with the calculated mechanical data and positron annihilation parameters. The variations in av and Hv with increasing aging time and aging temperature have been explained in terms of the formation and/or dissolution of Si precipitates of different number and size.
Al-Si Alloys, Positron Annihilation Life Time, Vickers Microhardness
[01] U. Holzwarth, P. Schaaff, On the non-destructive detection of fatigue damage in industrial aluminium alloys by positron annihilation, J. Mater. Sci. 42 (2007) 5620-5628.
[02] A. N-Malinowska, E. Dryzek, M. Hasik, J. Dryzek, Various types of polysiloxanes studied by positron annihilation lifetime spectroscopy, J. Molecular Struct. 1065 (2014) 254-261.
[03] E. E. Abdel-Hady, Study of microstructural defects in steel using positron annihilation lifetime technique, Nucl. Instrum. Meth. B 221 (2004) 225-229.
[04] E. E. Abdel-Hady, A, Ashry, H. Ismail, and S. El-Gamal, Studying the recovery of as-received industrial Al alloys by positron annihilation spectroscopy, Appl. Surf. Sci. 352 (2006) 3297-3302.
[05] D. K. Dwivedi, Adhesive wear behaviour of cast aluminium-silicon alloys: overview, Mater. Des. 31 (2010) 2517-2531.
[06] T. H. Lee, S. J. Hong, Microstructure and mechanical properties of Al-Si-X alloys fabricated by gas atomization and extrusion process, J. Alloys Compd. 487 (2009) 218-224.
[07] M. Kamiya, T. Yakou, T. Sasaki, Y. Nagatsuma, Effect of Si content on turning machinability of Al-Si binary alloy castings, Mater. Trans. 49 (2008) 587-592.
[08] T. Hosch, R. E. Napolitano, The effect of the flake to fiber transition in silicon morphology on the tensile properties of Al–Si eutectic alloys, Mater. Sci. Eng. A 528 (2010) 226-232.
[09] O. Uzun, F. Yılmaz, U. Kölemen, N. Başman, Sb effect on micro structural and mechanical properties of rapidly solidified Al–12Si alloy, J. Alloys Compd. 509 (2011) 21-26.
[10] S. El-Gamal, Positron annihilation study on the effect of Si-content on the recovery of deformed cast Al-Si alloys, Radiat. Phys. Chem. 90 (2013) 32-38.
[11] Y. Birol, Microstructural evolution during annealing of a rapidly solidified Al–Si alloy, J. Alloys Compd. 439 (2007) 81-86.
[12] S. Mohamed, N. Mostafa, E. Gomaa, M. Mohsen, Application of positron annihilation spectroscopy to study the recovery of commercial pure Al and Al-0.96 wt% Si alloys, J. Mater. Eng. Perform. 12 (2003) 95-98.
[13] R. Krause, G. Dlubek, O. Brümmer, S. Skladnikiewitz, H. Daut, Nucleation and precipitation in an Al-Si (1at%) alloy investigated by positron annihilation, Crys. Res. Techno. 20 (1985) 267-269.
[14] D. Segers, P. van Mourik, M. H. van Wijngaarden, B. M. Rao, Precipitation of silicon in a solid quenched aluminum-silicon (1.3 at%) alloy studied by positron annihilation, phys. status solidi (a) 81 (1984) 209-216.
[15] E. A. Badawi, M. A. Abdel-Rahman, E. M. Hassan, Vacancy migration and formation in A356 aluminum casting alloys by positron annihilation technique, Mater. Sci. Forum 445 (2004) 45-47.
[16] P. Schumacher, S. Pogatscher, M. J. Starink, C. Schick, V. Mohles, B. Milkereit, Quench-induced precipitates in Al–Si alloys: Calorimetric determination of solute content and characterisation of microstructure, Thermochimi. Acta 602 (2015) 63-73.
[17] Y. Yang, S-Yi Zhong, Z. Chen, M. Wang, N. Ma, H. Wang, Effect of Cr content and heat-treatment on the high temperature strength of eutectic Al-Si alloys, J. Alloys Compd. 647 (2015) 63-69.
[18] Kh. A. Abuhasel, M. F. Ibrahim, E. M. Elgallad, F. H. Samuel, On the impact toughness of Al-Si cast alloys, Mater. Des. 91 (2016) 388-397.
[19] H. Torabian, J. P. Pathak, S. N. Tiwari, Wear characteristics of Al-Si alloys, Wear 172 (1994) 49-58.
[20] B. K. Prasad, K. Venkateswarlu, O. P. Modi, A. K. Jha, S. Das, R. Dasgupta, A. H. Yegneswaran, Sliding wear behavior of some Al-Si alloys: role of shape and size of Si particles and test conditions, Met. Mater. Trans. 29A (1998) 2747-2752.
[21] F. Abd El-Salam, A. M. Abd El-Khalek, R. H. Nada, L. A. Wahab, H. Y. Zahran, Thermally induced structural and mechanical variations in ternary Al–Si based alloys, Mater. Sci. Eng. A 527 (2009) 281-286.
[22] E. E. Abdel-Hady, H. M. Abdel-Hamid, H. F. M. Mohamed, Electron beam and gamma irradiation effects on conducting polystyrene studied by positron annihilation technique, Radia. Measur. 38, (2004) 211-216.
[23] P. Kirkegaard, M. Eldrup, O. E. Mogensen, N. Pedersen, Program system for analysing positron lifetime spectra and angular correlation curves, Comput. Phys. Commu. 23 (1981) 307-335.
[24] J. Kansy, Microcomputer program for analysis of positron annihilation lifetime spectra, Nucl. Instru. Meth. Phys. Res. A 374 (1996) 253-244.
[25] A. F. Abd El-Rehim, M. S. Sakr, M. M. El-Sayed, M. Abd El-Hafez, Effect of Cu addition on the microstructure and mechanical properties of Al–30 wt% Zn alloy, J. Alloys Compd. 607 (2014) 157-162.
[26] A. Gaber, N. Afify, M. S. Mostafa, Investigation of the precipitation process in Al-Si alloys, J. Phys. D: Appl. Phys. 23 (1990) 1119-1123.
[27] K. Nakagawa, T. Kanadani, L. Anthony, H. Hashimoto, Microstructural changes at the initial stage of precipitation in an aluminum–silicon alloy, Mater. Trans. 46 (2005) 779-783.
[28] H. Inoue, T. Sato, Y. Kojima, T. Takahashi, The temperature limit for GP Zone formation in an Al-Zn-Mg Alloy, Metall. Trans. A124 (1981)1429-1434.
[29] J. Shen, Y. C. Liu, Y. J. Han, Y. M. Tian, H. X. Gao, Strengthening effects of ZrO2 nanoparticles on the microstructure and microhardness of Sn-3.5Ag lead-free solder , J. Electron. Mater. 35 (2006) 1672-1679.
[30] N. Hosseini, M. H. Abbasi, F. Karimzadeh, M.H. Enayati, Structural evolution and grain growth kinetics during isothermal heat treatment of nanostructured Al6061, Mater. Sci. Eng. A 525 (2009) 107-111.
[31] A. F. Abd El-Rehim, H. Y. Zahran, Effect of aging treatment on microstructure and creep behavior of Sn-Ag and Sn-Ag-Bi solder alloys, Mater. Sci. Technol. 30 (2014) 434-438.
MA 02210, USA
AIS is an academia-oriented and non-commercial institute aiming at providing users with a way to quickly and easily get the academic and scientific information.
Copyright © 2014 - 2017 American Institute of Science except certain content provided by third parties.