Aging Effects on Heat Treatment Response and Mechanical Properties of Al-(1 to 13 pct)Si-Mg Cast Alloys

2010 ◽  
Vol 42 (1) ◽  
pp. 181-188 ◽  
Author(s):  
Diana A. Lados ◽  
Diran Apelian ◽  
Libo Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Response ◽  
Aging Effects ◽  
Cast Alloys

Influence of Aluminium Content on Behaviour of Magnesium Cast Alloys in Bentonite Sand Mould

2009 ◽  
Vol 147-149 ◽  
pp. 764-769 ◽  
Author(s):  
Leszek Adam Dobrzański ◽  
Tomasz Tański
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Chemical Composition ◽  
Physical And Mechanical Properties ◽  
Aluminium Content ◽  
Cast State ◽  
Cast Alloys ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium ◽  
Cooling Methods

In this paper there is presented the structure and proprieties of the modeling cast magnesium alloys as cast state and after heat treatment, depending on the cooling medium (furnace, water, air), with different chemical composition. The improvement of the manufacturing technique and chemical composition as well as of heat treatment and cooling methods leads to the development of a material designing process for the optimal physical and mechanical properties of a new developed alloy. In the analysed alloys a structure of solid solution and fragile phase  (Mg17Al12) occurred mainly on grain borders as well as eutectic and AlMnFe, Mg2Si phase. The investigation is carried out to testy the influence of the chemical composition and precipitation processes on the structure and mechanical properties of the magnesium cast alloys with different chemical composition in its as cast alloys and after heat treatment.

scholarly journals Mechanical properties and corrosion resistance of Mg-RE cast alloys and their plasma electrolytic oxidation

2021 ◽  
Vol 2144 (1) ◽  
pp. 012010
Author(s):  
S V Zasypkin ◽  
A O Cheretaeva ◽  
M R Shafeev ◽  
D L Merson ◽  
M M Krishtal
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Electrolytic Oxidation ◽  
Cast Alloys ◽  
Mechanical Properties And Corrosion ◽  
Plasma Electrolytic ◽  
Cast Magnesium

Abstract The effect of heat treatment on the mechanical properties (hardness, plasticity, yield and tensile strength) and corrosion resistance of several cast magnesium alloys with additions of rare earth metals (Y, Nd and Gd), and their surface modification by plasma electrolytic oxidation (PEO) were investigated. It was found that the heat treatment of the alloys results information of Mg12YZn, Mg3Zn3Y2 and Mg24Y5 based LPSO-phases and causes an increase in hardness and tensile strength by 5-7 and 20-25%, respectively, but at the same time, corrosion resistance of the alloysdrops by 10-20 times. PEO of the alloys after heat treatment reduced the corrosion currents by 1-3 orders of magnitude without changing the corrosion potential.

scholarly journals Study of the precipitation hardening process in recycled Al-Si-Cu cast alloys

2017 ◽  
Vol 62 (1) ◽  
pp. 397-403 ◽  
Author(s):  
L. Kuchariková ◽  
E. Tillová ◽  
M. Matvija ◽  
J. Belan ◽  
M. Chalupová
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Precipitation Hardening ◽  
Cast Alloy ◽  
Solution Treatment ◽  
Second Phase ◽  
Thin Foils ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Cast Alloys

AbstractThe formation of extremely small uniformly dispersed particles of a second phase within the original phase matrix during heat treatment changed material properties. Therefore the characterization of precipitation had been investigated using high resolution transmission electron microscopy (TEM) and electron diffraction of thin foils for an AlSi9Cu3 cast alloy. For investigation the hardening effect onto mechanical properties of aluminium cast was used heat treatment, which consisted from solution treatment at 515°C / 4 hours (h), followed by quenching into water with temperature 50°C and artificial aging using different temperatures 170°C and 190°C with different holding time 2, 4, 8, 16, and 32 hours. The observations of microstructure and substructure reveals that precipitation hardening has caused great changes in size, morphology and distributions of structural components, the formation of precipitates of Cu phases, and the change of mechanical properties as well.

Consequences of Inappropriate Temperatures of the Solution Heat Treatment in Al-Si-Cu Cast Alloys

2020 ◽  
Vol 405 ◽  
pp. 357-364
Author(s):  
Lenka Kuchariková ◽  
Eva Tillová ◽  
Ivana Švecová
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Solution Treatment ◽  
Age Hardening ◽  
Solution Temperature ◽  
Optimum Conditions ◽  
Cu Alloy ◽  
Cast Alloys ◽  
Casting Industry

Al-Si-Cu alloy systems have a great importance in the casting industry due to their excellent castability, good mechanical properties and wear resistance. Addition of alloying elements, such as Mg and Cu, makes these alloys heat treatable. Improving of their mechanical properties allows their using in new, more demanding applications (e.g. engines, cylinder heads etc.). The most applied heat treatment for this alloy is a T6 (age hardening). Such a heat treatment is required for precipitation of the Al2Cu hardening dispersed phase that increases the mechanical properties of Al alloys. Therefore, the consequences of different solution heat treatment temperatures 505, 515 and 525 °C for AlSi9Cu3 and 515, 525 and 545 °C for AlSi12Cu1Fe cast alloys, with holding times 2, 4, 8, 16 and 32 hours, were investigated in this study. The effect of solution treatment was evaluated based on changes in microstructure (optical microscopy) and mechanical properties (hardness, impact energy and ultimate tensile strength). The study confirms the strengthening of the experimental alloys caused by application of optimum conditions of T6 and melting of the Cu-rich phases with application of inappropriate solution temperature, as well as distortion and changes of the testing bars.

The Effect of Aging Heat Treatment on the Sliding Wear Behavior of Cu-Al-Fe-(x) Alloys

2011 ◽  
Vol 219-220 ◽  
pp. 195-201 ◽  
Author(s):  
Guo Fa Mi ◽  
Jin Zhi Zhang ◽  
San Lei Lv ◽  
Ping Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Wear Behavior ◽  
Solution Treatment ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Suitable Heat Treatment ◽  
Ni Alloy ◽  
Cast Alloys

Wear behaviour of aged casting Cu-Al-Fe-Be and Cu-Al-Fe-Ni aluminum bronzes was studied in this paper. The microstructures, mechanical properties of hardness and tensile strength, were evaluated experimentally. The friction and wear resistance, and the electrical resistivity of the materials were assessed. The results show that mechanical properties of the Cu-Al-Fe-Be alloy have been improved by solution treatment at 950°C for 120 min followed by aging at 350°C for 120 min, whilst the most suitable heat treatment for the Cu-Al-Fe-Ni alloy was solution treatment at 950°C for 120 min followed by aging at 450°C for 120 min. In the wear testing, the as-cast alloys was dominated by abrasive wear, and the increase in load and sliding velocity, the adhesive wear and oxidation wear dominated. The experimental results also showed that the Cu-Al-Fe-Be alloy possessed higher hardness and tensile strength, lower friction coefficient and lower wear rate compared to the Cu-Al-Fe-Ni alloy.

Effect of Alloying Elements on Mechanical Properties of Al-Si-Cu-Mg Cast Alloys

2015 ◽  
Vol 817 ◽  
pp. 127-131
Author(s):  
Yan Peng Pan ◽  
Zhi Feng Zhang ◽  
Bao Li ◽  
Bi Cheng Yang ◽  
Jun Xu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Performance ◽  
Cast Alloy ◽  
Experimental Results ◽  
Alloying Elements ◽  
Mg Alloy ◽  
T6 Heat Treatment ◽  
Specific Composition ◽  
Cast Alloys

To develop Al-Si cast alloys with high performance is important for lightweighting vehicles. In this study, the effects of the alloying elements such as Si, Cu, Mg contents (5%-7% Si, 1%-3%Cu, 0.3%-0.9%Mg) on mechanical properties of a test Al-Si-Cu-Mg cast alloy was studied to achieve a specific composition. The experimental results show that the Al-6%Si-3%Cu-0.3%Mg alloy has better comprehensive mechanical properties after T6 heat treatment, which indicates a remarkable interaction of the alloying elements for improving performance.

Heat Treatment Response of Selectively Laser Melted AlSi10Mg

2020 ◽  
Vol 75 (5) ◽  
pp. 113-127
Author(s):  
Simon Kleiner ◽  
Josef Zürcher ◽  
Otmar Bauer ◽  
Patrick Margraf
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Response ◽  
Solution Heat Treatment ◽  
Cast Alloy ◽  
Artificial Ageing ◽  
Cellular Microstructure ◽  
Stress Relieving ◽  
Melted Material

Abstract The age-hardenable cast alloy AlSi10Mg is the most widely used alloy for additive manufacturing of aluminium components by means of selective laser melting. Due to the rapid solidification, the material exhibits a fine cellular microstructure, composed of a supersaturated Al-matrix and a network of silicon along the cell boundaries. The temperature of the building platform as well as the built time both have an influence on the level of precipitation in the material and this in turn affects the heat treatment response of AlSi10Mg in as-built condition. Material built on a cold platform can be strengthened by direct artificial ageing and shows only a small loss in strength after a stress relief heat treatment. Material built on a preheated platform has the highest strength in as-built condition and subsequent artificial ageing or stress relieving causes softening of the material. A condition which is truly independent of the platform temperature can only be reached by applying a solution heat treatment followed by quenching. Unlike castings, which need a long-term solution heat treatment to reach optimum mechanical properties, the selectively laser melted material shows the best mechanical properties in T6-condition after a solution heat treatment of short duration

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