Al 7075 powder

Overview of Al 7075 Powder

Al 7075 is one of the highest strength 7000 series aluminum alloys, offering strength superior to many steels. Zinc is the main alloying addition while magnesium imparts strength through precipitation hardening.

Key properties of Al 7075 powder include:

• Exceptionally high tensile and yield strength
• High hardness and good fatigue strength
• Good toughness and moderate ductility
• Excellent finishing characteristics
• Alta resistencia a la corrosión
• Disponible en una gama de tamaños y formas de polvo

Al 7075 powder is ideal for high-performance aerospace and defense components needing the optimal combination of strength, hardness, fatigue resistance, and moderate weldability.

Chemical Composition of Al 7075 Powder

The typical chemical composition of Al 7075 powder is:

Elemento	Porcentaje de peso
Aluminio (Al)	87.1-91.4%
El zinc (Zn)	5.1-6.1%
Magnesio (Mg)	2.1-2.9%
Cobre (Cu)	1.2-2.0%
Hierro (Fe)	0-0.5%
Silicio (Si)	0-0.4%
Manganeso (Mn)	0-0.3%
Cromo (Cr)	0.18-0.28%
Titanio (Ti)	0-0.2%

Zinc is the primary alloying element while magnesium and copper enhance strength through precipitation hardening. Trace elements like iron, manganese, chromium have minor effects.

Properties of Al 7075 Powder

Key properties of Al 7075 powder include:

Propiedad	Valor
Densidad	2.81 g/cm3
Punto de Fusión	477ÿ635¡«C
Conductividad térmica	130ÿ210 W/mK
Conductividad eléctrica	22-30% IACS
Módulo de Young	71ÿ72 GPa
Coeficiente de Poisson	0.33
Resistencia a la tensión	570ÿ635 MPa
Resistencia elástica	505ÿ570 MPa
Elongación	7ÿ10%
Dureza	150ÿ190 Brinell

 

The zinc additions result in extremely high strength and hardness while maintaining reasonable ductility and toughness. The alloy has excellent finishing characteristics.

Production Method for Al 7075 Powder

Commercial production methods for Al 7075 powder include:

• Atomización de gas?- Molten alloy stream disintegrated by inert gas jets into fine spherical powder particles with controlled size distribution.
• Atomización de agua?- High pressure water jet used to produce fine Al 7075 powders with irregular shape. Lower cost but higher oxygen pickup.
• Aleación Mecánica?- Ball milling a blend of aluminum and alloying element powders followed by cold compaction and sintering.

Gas atomization offers superior control over powder characteristics like particle size, shape and microstructure.

Applications of Al 7075 Powder

Common applications of Al 7075 powder include:

• fabricación aditiva?- Used in selective laser melting, direct metal laser sintering to produce complex, lightweight aerospace and defense parts.
• Moldeo por inyección de metal?- To manufacture small intricate components with high strength and moderate corrosion resistance.
• Metalurgia del polvo?- Press and sinter process to create high-performance automotive parts and machinery components.
• Pulverización térmica?- Wire arc spraying to deposit very hard and wear resistant Al 7075 coatings.
• Pirotecnia.?- Added as fuel constituent in pyrotechnic compositions due to its high reactivity.
• Metal de aportacion para soldadura?- Used as filler wire providing weld strength but limited weldability.

Specifications of Al 7075 Powder

Al 7075 powder is available in various size ranges, shapes, grades and purity levels:

• Tamaño de las partículas:?De 10 a 45 micrones en los métodos AM hasta 120 micrones en los procesos de pulverización térmica.
• Morfología:?Spherical, irregular and mixed particle shapes. Smooth spherical powder has better flowability.
• Pureza:?From commercial to high purity grades tailored for the specific application.
• Calificaciones:?Conforming to ASTM B951, AMS 4045, AMS 4282, EN 573-3 and other equivalent standards.
• Contenido de Oxígeno:?Varies between 500-1500 ppm based on production method. Lower is better.

Global Suppliers of Al 7075 Powder

Algunos de los principales proveedores a nivel mundial son:

• Sandvik Osprey (RU)
• TLS Technik (Alemania)
• Valimet Inc. (EUA)
• Polvo de CNPC (China)
• Makin Metal Powders (Reino Unido)
• PyroGenesis Canadá
• Metal Powder Company (Estados Unidos)

These companies produce Al 7075 powder suitable for various applications using different manufacturing processes.

Al 7075 Powder Pricing

Pricing of Al 7075 powder depends on factors like:

• Niveles de pureza
• Características de las partículas
• Método de producción del polvo
• Cantidad del pedido
• Proveedor y ubicación geográfica

Grado	Rango de precios
Comercial	$10-20 per kg
Alta pureza	$20-40 por kg
Ultrafino	$40-80 per kg
Grado especial	$80-150 per kg

 

Gas atomized, controlled particle size, high purity powders command much higher pricing than simple commercial grade Al 7075 powder.

Storage and Handling of Al 7075 Powder

Al 7075 reactive alloy powder must be handled with care to prevent:

• Oxidación y reacción con la humedad
• Riesgos de explosión por polvo a partir de polvo fino
• Problemas de salud relacionados con la inhalación
• Deben seguirse las prácticas de seguridad recomendadas por el proveedor

Inert gas blanketing, proper grounding, ventilation, and PPE should be utilized for safe handling.

Métodos de pruebas y caracterización

Key test methods used for Al 7075 powder include:

• Chemical composition analysis using OES or XRF
• Distribución de tamaño de partícula conforme a la norma ASTM B822
• Análisis de morfología por SEM
• Powder flow rate using Hall flowmeter
• Medición de densidad por picnometría de helio
• Pruebas de impurezas mediante ICP-MS
• Examen microestructural por difracción de rayos X

These tests ensure the powder meets the required chemical, physical, and microstructural characteristics for the specific application.

Comparison Between Al 7075 and Al 6061 Powder

Al 7075 and Al 6061 are two aluminum alloy powders compared:

Parámetro	Al 7075	Al 6061
Tipo de aleación	Tratables con calor	Tratables con calor
Contenido de Zn	5.1-6.1%	0%
contenido Mg	2.1-2.9%	0.8-1.2%
Fuerza	Much higher	Moderado
Maquinabilidad	Pobre	Excelente
Soldabilidad	Pobre	Muy bueno
Resistencia a la corrosión	Moderado	Excelente
Coste	Alto	Inferior

 

Al 7075 offers very high strength whereas Al 6061 provides better corrosion resistance, weldability and machinability at lower cost.

Al 7075 Powder FAQs

Q: How is Al 7075 powder produced?

A: Al 7075 powder is commercially produced using gas atomization, water atomization, mechanical alloying and electrolysis techniques. Gas atomization offers the best control of particle characteristics.

Q: What are the main applications for Al 7075 powder?

A: The major applications for Al 7075 are additive manufacturing, thermal spray coatings, powder metallurgy parts manufacturing, metal injection molding, and pyrotechnic compositions requiring exceptionally high strength.

Q: What is the recommended particle size for Al 7075 powder in AM?

A: For most metal 3D printing processes, the ideal particle size range for Al 7075 is 15-45 microns with spherical morphology and good powder flowability.

Q: Does Al 7075 powder require any special handling precautions?

A: Yes, it is recommended to handle reactive aluminum alloy powders carefully under inert atmosphere using proper grounding, ventilation and PPE.

Q: Where can I purchase ultrafine Al 7075 powder suitable for aerospace components?

A: High purity, gas atomized ultrafine Al 7075 powders meeting aerospace requirements can be sourced from leading suppliers such as Sandvik Osprey, TLS Technik, and Valimet Inc.