Making Sense of Oxides in Hot Working

  • Thread starter darkelf
  • Start date
  • Tags
    Hot
In summary, the conversation is about the effect of different oxides on the properties of various materials, with a specific question about whether oxides can make a metal brittle. The response is that oxides can have a detrimental effect on properties and a resource is provided for further reading on dispersion strengthening in metals and alloys.
  • #1
darkelf
77
0
Hello,

I'm working on material transfer during hot working. My chemistry isn't to good. Could anyone explain if different oxides give different properties to different materials. Say MgO, would it give a different property to Aluminium from that it would give say Steel?

If so is there anyway I can find out what property an oxide gives as in is there like a catalog?

Thanks
 
Engineering news on Phys.org
  • #2
Oxides will be chemically different in different alloys, but they generally have the same behavior - dispersion strengthening.

See - High-Strength Aluminum P/M Alloys
http://nonferrous.keytometals.com/default.aspx?ID=CheckArticle&NM=62

More generally - Nonferrous alloys
http://nonferrous.keytometals.com/default.aspx?ID=Articles

For steel - http://steel.keytometals.com/default.aspx?ID=Articles

The Strengthening of Iron and Steel
http://steel.keytometals.com/default.aspx?ID=CheckArticle&NM=107
 
Last edited by a moderator:
  • #3
Thanks, but is it possible for oxides to make a metal brittle? Say Magnesium oxides in Al?
 
  • #4
darkelf said:
Thanks, but is it possible for oxides to make a metal brittle? Say Magnesium oxides in Al?
Sure. At some level the oxides are not beneficial but detrimental to the desirable properties, such as strength and toughness.

See this - Dispersion strengthened metals and alloys
 

1. What are oxides and how do they form during hot working?

Oxides are compounds that form when a metal is exposed to oxygen. During hot working, the high temperatures cause the metal to react with the surrounding air, resulting in the formation of oxides on the surface of the metal.

2. Why are oxides a concern in hot working processes?

Oxides can have a negative impact on the quality of the metal being worked. They can create surface defects, reduce ductility, and weaken the metal's mechanical properties. They can also cause problems with shaping and finishing the metal.

3. How can oxides be controlled during hot working?

There are several methods for controlling oxides during hot working. One approach is to use a protective atmosphere, such as a gas or oil, to prevent oxygen from reaching the metal. Another method is to use a reducing agent, such as hydrogen, to remove existing oxides on the surface of the metal.

4. What are the effects of different types of oxides in hot working?

The effects of oxides can vary depending on the type of oxide present. For example, iron oxide (rust) can form on steel and create a rough surface, whereas aluminum oxide can create a smoother, more protective layer on aluminum. Different oxides can also have different melting points, which can impact the hot working temperature and process.

5. How can the presence of oxides be detected in hot working?

Oxides can typically be detected visually as a discoloration or roughness on the surface of the metal. However, more precise methods such as x-ray diffraction or electron microscopy may be used to identify and analyze the type and amount of oxides present in a sample.

Similar threads

Research question about burning metals and their flashes and colors
    • Materials and Chemical Engineering
Replies
12
Views
2K
Thermal insulating materials suitable for making piston and cylinder?
    • Materials and Chemical Engineering
Replies
6
Views
1K
Thermophysical properties of iron oxide scales
    • Materials and Chemical Engineering
Replies
7
Views
6K
Complete thermal decomposition of specific compounds
    • Chemistry
Replies
4
Views
1K
Keeping food hot in food delivery bag
    • General Engineering
Replies
19
Views
6K
Thermal diffusivity vs conductivity
    • Materials and Chemical Engineering
Replies
1
Views
22K
Amorphous and crystalline oxides
    • Materials and Chemical Engineering
Replies
2
Views
5K
Recovery/development of low grade copper ore
    • Chemistry
Replies
1
Views
730
Why Not Titanium Alloy Rocket Engine Nozzles?
    • Aerospace Engineering
Replies
19
Views
3K
Calculating the force that a permanent magnet exerts on a particle
    • General Engineering
Replies
14
Views
2K

Hot Threads

Recent Insights

Back
Top