ALCOA 560

Alloy Digest ◽  
2021 ◽  
Vol 70 (7) ◽  
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Corrosion Resistance ◽  
Hot Cracking ◽  
Structural Components ◽  
Manganese Alloy ◽  
Die Cast ◽  
Production Problems ◽  
Cast Condition ◽  
Cracking Tendency

Abstract Alcoa 560 is a proprietary, non-heat-treatable, aluminum-magnesium-manganese alloy developed by Alcoa in the late 1990s for high pressure die cast structural components. This alloy develops the required strength and toughness in the as-cast condition, thus eliminating or minimizing numerous production problems, such as distortion, blistering, property variations, and heat treatment logistics. The application of this alloy is limited to simple-shaped components due to its high hot cracking tendency. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting and joining. Filing Code: Al-478. Producer or source: Alcoa Corporation.

ALCOA EZCAST-NHT A152 AND A153

Alloy Digest ◽  
2020 ◽  
Vol 69 (10) ◽  
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Corrosion Resistance ◽  
Aluminum Alloys ◽  
Physical Properties ◽  
Die Casting ◽  
Alloying Element ◽  
Pressure Die Casting ◽  
Production Problems ◽  
Cast Condition

Abstract Alcoa EZCast-NHT A152 and A153 are proprietary, non-heat-treatable, high-pressure die casting (HPDC) aluminum alloys in which magnesium is the principal alloying element. These alloys develop the required strength and toughness in the as-cast condition, thus eliminating or minimizing numerous production problems, such as distortion, blistering, property variations, and heat treatment logistics. This datasheet provides information on composition, physical properties, microstructure, elasticity, and tensile properties. It also includes information on corrosion resistance. Filing Code: Al-469. Producer or source: Alcoa Corporation.

Comparison of Corrosion Resistance of High Pressure Die-Cast and Semi-Solid Cast AZ91, AM60, Alloys and Respective Anodic Oxides

2013 ◽  
Vol 765 ◽  
pp. 618-622
Author(s):  
Carmine Genoni ◽  
Anna da Forno ◽  
Massimiliano Bestetti
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
High Pressure ◽  
Corrosion Resistance ◽  
Open Circuit Potential ◽  
Open Circuit ◽  
Environment Friendly ◽  
Die Cast ◽  
Cast Alloys ◽  
Semi Solid

A comparison of corrosion resistance of die-cast and semi-solid cast AZ91and AM60 magnesium alloys was performed in corrosive medium by measurement of the open circuit potential and potentiodynamic scans. Before testing, a heat treatment was carried out on the semi-solid cast alloys. Moreover, electrochemical measurements were performed on the four different substrates anodized in the micro-arc regime in an environment friendly alkaline aqueous solution. The results could be correlated to the different microstructures of the samples produced by the different processes and to the different compactness/porosity of the oxides.

Corrosion Behaviour of High Pressure Die-Cast and Semi-Solid Cast AZ91, AM60 and AM50 Alloys

2012 ◽  
Vol 192-193 ◽  
pp. 231-237 ◽  
Author(s):  
Simone Umberto Mariani ◽  
Anna da Forno ◽  
Massimiliano Bestetti
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Corrosion Resistance ◽  
Open Circuit Potential ◽  
Corrosion Behaviour ◽  
Open Circuit ◽  
Corrosive Media ◽  
Die Cast ◽  
Cast Alloys ◽  
Semi Solid

A comparison of corrosion resistance of die-cast and semi-solid cast AZ91, AM60 and AM50 magnesium alloys was performed in different corrosive media by measurement of the open circuit potential, potentiodynamic scans and weight loss tests. Before testing, a heat treatment was carried out onto semi-solid cast alloys. Electrochemical measurements have shown that the semi-solid cast alloys have a different corrosion rate compared to the die-cast ones. The results could be correlated to the different microstructures of the samples produced by the different processes.

EN AC-46500 Injected by Semi-Solid Rheocasting

2008 ◽  
Vol 141-143 ◽  
pp. 283-288 ◽  
Author(s):  
Manel Campillo ◽  
Maite T. Baile ◽  
Sergi Menargues ◽  
Antonio Forn
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Pressure ◽  
Structural Integrity ◽  
Tensile Tests ◽  
Simulation Software ◽  
Industrial Plant ◽  
Forming Process ◽  
Die Cast ◽  
Semi Solid

EN AC-46500 aluminium components are formed by Semi-Solid Rheocasting (SSR) in an industrial plant using a 700 tons high pressure machine. The dies wear was designed by the PLCO model of the ProCast simulation software. The components have had a good structural integrity and the mechanical properties after T6 treatment have been equivalent to that obtained by the same alloy by die cast. The present work describes the SSR forming process, the resulting microstructure as well as the optimization of the ageing heat treatment by hardness evolution. The results of the tensile tests make these clear.

Industrial Heat Treatment of R-HPDC A356 Automotive Brake Callipers

2012 ◽  
Vol 192-193 ◽  
pp. 533-538 ◽  
Author(s):  
Levy Chauke ◽  
Heinrich Möller ◽  
Ulyate Andries Curle ◽  
Gonasagren Govender
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Automotive Industry ◽  
Laboratory Scale ◽  
Heat Treated ◽  
Die Cast ◽  
Eutectic Si ◽  
Hardness Increase ◽  
Cast Condition ◽  
Automotive Brake

Heat treatment of rheo-high pressure die cast (R-HPDC) A356 brake callipers has produced good mechanical properties on the laboratory scale. An industrial heat treatment is required to evaluate the applicability and conformance of the R-HPDC A356 brake callipers to the automotive industry. This research studied A356 brake callipers heat treated on the industrial scale with particular emphasis on the resulting microstructure, hardness and tensile properties. The eutectic Si-particle spheroidisation after solution heat treatment was achieved and observed with optical microscopy. A hardness increase from 64 to 100 Vickers was achieved from the as-cast condition to the industrially heat treated T6 condition. The heat treatment caused no significant variation in hardness and tensile properties from brake callipers within the same batch or from different batches. The yield and ultimate strengths of the industrial heat treated brake callipers were lower compared to the laboratory scale heat treatment properties, while the ductility increased, mainly due to quenching effects. Even though the industrial heat treated A356 brake callipers resulted in yield and ultimate tensile strengths lower than those achieved on a laboratory scale, they still exceeded the minimum specifications for gravity die cast A356 brake callipers.

scholarly journals Strain Rate during Creep in High-Pressure Die-Cast AZ91 Magnesium Alloys at Intermediate Temperatures

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 872
Author(s):  
Mónica Preciado ◽  
Pedro Bravo ◽  
José Calaf ◽  
Daniel Ballorca
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Magnesium Alloys ◽  
Creep Behavior ◽  
Metallic Phase ◽  
Creep Testing ◽  
Strain Rates ◽  
Die Cast ◽  
Az91 Magnesium ◽  
The Stability

During creep, magnesium alloys undergo microstructural changes due to temperature and stress. These alterations are associated with the evolution of the present phases at a microstructural level, creating different strain rates during primary and tertiary creep, and with the stability of the inter-metallic phase Mg17Al12 formed at these temperatures. In this paper, the results of creep testing of high-pressure die-cast AZ91 magnesium alloys are reported. During creep, continuous and discontinuous precipitates grow, which influences creep resistance. The creep mechanism that acts at these intermediate temperatures up to 150 °C is termed dislocation climbing. Finally, the influence of the type of precipitates on the creep behavior of alloys is determined by promoting the formation of continuous precipitates by a short heat treatment prior to creep testing.

CDC MANGANESE ALLOY No. 720

Alloy Digest ◽  
1954 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Fatigue Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Heat Treating ◽  
Manganese Alloy ◽  
Copper Manganese ◽  
Development Corporation

Abstract C.D.C. MANGANESE ALLOY No. 720 is a copper-manganese-nickel alloy that responds to hardening by heat treatment. It has high tensile and fatigue strength, wide hardness range, and excellent corrosion resisting characteristics. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-14. Producer or source: Chicago Development Corporation.

Heat treatment of vacuum high pressure die cast magnesium alloy AZ91

2013 ◽  
Vol 27 (3) ◽  
pp. 161-166 ◽  
Author(s):  
X. J. Wang ◽  
S. M. Zhu ◽  
M. A. Easton ◽  
M. A. Gibson ◽  
G. Savage
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Magnesium Alloy ◽  
Alloy Az91 ◽  
Magnesium Alloy Az91 ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Optimization of the Solution Heat Treatment of Rheo-High Pressure Die Cast Al-Cu-Mg-Ag 2139 Alloy

2015 ◽  
Vol 828-829 ◽  
pp. 226-231 ◽  
Author(s):  
Pfarelo Daswa ◽  
Heinrich Möller ◽  
Gonasagren Govender
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Aluminium Alloy ◽  
Solution Heat Treatment ◽  
Volume Fraction ◽  
High Volume ◽  
Single Step ◽  
Incipient Melting ◽  
Scanning Calorimetry ◽  
Die Cast

This paper investigates the optimization of the solution heat treatment parameters of the rheo-high pressure die cast (R-HPDC) 2139 aluminium alloy. Differential Scanning Calorimetry (DSC) and optical microscopy were used to investigate the incidence of incipient melting and therefore determine suitable solution heat treatment temperatures. A three-step solution heat treatment where the alloy was heat treated from 400°C to 513°C using controlled heating conditions and held at 513°C for 2 hours and finally heated up from 513°C to 525°C and held there for 16 hours was done. R-HPDC is known to produce surface liquid segregation and when processing the alloys these areas are most prone to incipient melting. The applicability of a single (525°C for 16h) and three-step solution heat treatments on the R-HPDC 2139 aluminium alloy was also investigated. A single-step solution heat treatment results in incipient melting, whereas this is mostly eliminated using the three-step solution heat treatment. However, a high volume fraction of undissolved phases remain in the liquid segregated areas, even after the three-step solution heat treatment.

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