Materials Technology at Hochschule Rhein-Waal

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Study with flashcards and summaries for the course Materials Technology at the Hochschule Rhein-Waal

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

What role does Cl play in the production chain of titanium?

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

What is the difference between primary and secondary alloys?

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

What is the difference between casting and wrought alloys?

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Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

Explain phenomenon of strain hardening during cold rolling of aluminum. Use diagram

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

Explain the process "Cladding" with regard to aluminum

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

List the main manufacturing steps in Al-Extrusion.

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

List 10 specific applications for extruded aluminum product
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Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

Controlled atmosphere brazing is used to produce aluminum heat exchangers. What is the typical delivery form of the used flux and how is it applied to the aluminum parts? 

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

What is capillary action?

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

Grain fining improves

Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

 Name 3 properties of casting alloys which are important for the final product

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Aluminum value chain

(6 steps)

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Exemplary flashcards for Materials Technology at the Hochschule Rhein-Waal on StudySmarter:

Materials Technology

What role does Cl play in the production chain of titanium?

Turning the titanium-oxide (rutil) to gas through carbo-chloration 750-1000 °C resulting in titanium tetrachloride (TiCl4)

(reducing chloration)


[chloride process is used to separate titanium from its ores]

Materials Technology

What is the difference between primary and secondary alloys?

Primary = “fresh” Aluminium
Secondary = recycled

Materials Technology

What is the difference between casting and wrought alloys?

In wrought casting (worked after casting): Al +

  • Iron
  • Silicon
  • Manganese
  • Magnesium
  • Zinc
  • Copper

In casting:

  • Silicon
  • Magnesium
  • Zinc
  • Copper

can be mixed in many combinations


Materials Technology

Explain phenomenon of strain hardening during cold rolling of aluminum. Use diagram

Dislocations are being produced in cold rolling process. This causes hardening of the metals and yield strength increase.(The stress needed to roll the metal is smaller due to the dislocations than if the dislocation would not be able to move through the metal)


Materials Technology

Explain the process "Cladding" with regard to aluminum

Between Casting and Preheating another step is added: package building. Reduced thickness of the slab (~450 mm), rolled braze. Cut it to length and place it on the core. In hot rolling process it is kind of welded to the slab.

After the process: 

  • may have to do chemical or thermal degreasing (heat exchanger with brazing furnace)
  • typically slittet
  • packaged

Materials Technology

List the main manufacturing steps in Al-Extrusion.

1. Alloy

2. Casting
3. Homogenization 
4. Cooling
5. Pre-heating
6. Extrusion
7. Quenching
8. Ageing  

Materials Technology

List 10 specific applications for extruded aluminum product
1. Window frames
Automotive industry: 
2. chassis subframes
3. Crash box
4. Airbag housing
5. Heat exchanger tubing 

6. Railway carriages
7. For welding or snap-fit

Aerospace industry
8. Ribs
9. Stringers
10. Floor sections

11. heat sinks

Materials Technology

Controlled atmosphere brazing is used to produce aluminum heat exchangers. What is the typical delivery form of the used flux and how is it applied to the aluminum parts? 
They are sprayed with a flux suspension

Materials Technology

What is capillary action?
The ability of a liquid to flow in narrow spaces without external forces, but due to intermolecular forces. It diameter is sufficiently small the combination of surface tension and adhesive forces between liquid and container will act to propel the liquid

Materials Technology

Grain fining improves
Strength and strain

Materials Technology

 Name 3 properties of casting alloys which are important for the final product

  • density
  • corrosion resistance
  • conductivity
  • ductility
  • strength
  • creep resistance

Materials Technology

Aluminum value chain

(6 steps)

Upstream business:

  1. Bauxite / Alumina
  2. Primary Aluminum

Downstream business:

3. cast house products

4. Rolling / Extrusion

5. Manufacturing & Systems

6. Products, Applications

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