Influence of Different Si Levels on Mechanical Properties of Aluminium Casting Alloys

Öz

AlSi7 and AlSi11 are the most commonly used materials in aluminum alloy wheel production. The main difference is the heat treatment application; for wheel production AlSi7 is usually used in heat treated form while AlSi11 is not. Heat treatment processes play a vital role on production costs. More than fifty percent of aluminum wheels are heat treated however the exact value varies between different manufacturers. Additional heat treatment costs directly affect the competitiveness of the manufacturer. In this study the material properties of an alternative Si level between AlSi7 and AlSi11 are examined and the effects of these intermediate Si levels on mechanical properties are compared with that of AlSi7 and AlSi11. The aim of this study to examine the possibility of obtaining mechanical properties of heat treated AlSi7 with a non-heat-treated material differing only in Si content. In this experiment all processes and casting parameters for different material types are the same except for the Si content. In addition to an experimental study, the mechanical properties of the alternative material are simulated by utilizing a material analysis software and these properties are compared with experimental results. Thus, correlation between simulation and experimental study results can also be examined. As a conclusion, the alternative non-heat-treated material is presented to manufacturers. These results may be used to bypass the heat treatment process and to decrease the cost of final product.

Anahtar Kelimeler

• Aluminum,Heat Treatment,Mechanical Properties,Simulation of Material Properties

Kaynakça

1. [1]. J. Pezda and A. Jarco, Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy, Arcihes of Foundry Engineering Volume 16, Issue 4 / 95 – 100, 2016
2. [2]. L.Y. Pio, Effect of T6 Heat Treatment on the Mechanical Properties of Gravity Die Cast A356 Aluminium Alloy, Journal of Applied Sciences 11 (11): 2048-2052, 2011
3. [3]. V. Grubisic, Air Tightness Control of Passenger Car Wheels, Scientific Research Publishing, 171-180, 2017
4. [4]. T. LIPIŃSKI, Double Modification of AlSi₉Mg Alloy with Boron, Titanium and Strontium, Archives of Metallurgy and Materials, Volume 60 Issue 3: 2415-2419, 2015
5. [5]. AlSiMg Alloy, Sr-Refined, Artificially Aged, Cevher Inner Standard – Specification, 2014
6. [6]. Sr-Refined Eutectic AlSi Alloy, Cevher Inner Standard – Specification, 2004
7. [7]. Rheinfelden, Primary Aluminium Casting Alloys, Datasheet L 2.06/3-KH
8. [8]. Y. Birol, Effect of solution heat treatment on the age hardening capacity of dendritic and globular AlSi7Mg0.6 Alloys, International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde): 439-444, March 2010

9. [9]. Testing of metallic materials – Tensile test pieces, Prüfung metallischer Werkstoffe – Zugproben Deutsche Norm DIN 50125, 2016
10. [10]. Metallic materials - Tensile testing - Part 1: Method of test at room temperature, Metalik malzemeler - Çekme deneyi - Bölüm 1: Ortam sıcaklığında deney metodu, TS EN ISO 6892-1:2016, 2016
11. [11]. Road vehicles — Wheels/rims for commercial vehicles — Test methods, Karayolu taşıtları - Ticari taşıtlar için tekerlekler/jantlar - Deney yöntemleri, TS ISO 3894, 2015
12. [12]. Road vehicles — Light alloy wheels – Impact test, ISO 7141, 2005
13. [13]. R.B. Thakare, Stress Analysis in Wheel Rim by using Dynamic Cornering Fatigue Test Under Different Conditions, IJARIIE: International Journal of Advance Research and Innovative Ideas Vol-3 Issue-2, 2017
14. [14]. Metallic materials — Charpy pendulum impact test — Part 1: Test method, ISO 148-1 2009