Podcast
Questions and Answers
Why are austenitic stainless steels used extensively in aircraft?
Why are austenitic stainless steels used extensively in aircraft?
- For their high sulfur content.
- For their compatibility with welding processes.
- For their low melting temperatures and thermal conductivity.
- For their high strength and resistance to corrosion at high temperatures. (correct)
Which stainless steel type is an exception in terms of weldability due to its high sulfur content?
Which stainless steel type is an exception in terms of weldability due to its high sulfur content?
- AISI 309
- AISI 316
- AISI 303 (correct)
- AISI 317
What should be done more frequently with tack welds when working with austenitic stainless steels?
What should be done more frequently with tack welds when working with austenitic stainless steels?
- Apply them with lower current.
- Skip applying them on thinner materials.
- Use fixtures and jigs for application.
- Apply them twice as often as usual. (correct)
Why do thinner materials made of austenitic stainless steels require special precautions during welding?
Why do thinner materials made of austenitic stainless steels require special precautions during welding?
Which filler metal alloy is NOT recommended for welding austenitic stainless steels?
Which filler metal alloy is NOT recommended for welding austenitic stainless steels?
Why is it important to clean the base metal just prior to welding austenitic stainless steels?
Why is it important to clean the base metal just prior to welding austenitic stainless steels?
What is recommended to clean the surface and joint edges before welding?
What is recommended to clean the surface and joint edges before welding?
Which method is suggested for moving the torch along the joint to form a weld bead?
Which method is suggested for moving the torch along the joint to form a weld bead?
How is the filler metal typically introduced into the weld puddle?
How is the filler metal typically introduced into the weld puddle?
What is used to protect the base metal during the welding process?
What is used to protect the base metal during the welding process?
What is back purging in welding used for?
What is back purging in welding used for?
Why is an AC output waveform typically set in TIG welding of aluminum?
Why is an AC output waveform typically set in TIG welding of aluminum?
Why should the welding area be free of air drafts?
Why should the welding area be free of air drafts?
Which shielding gas is preferred for manual welding of titanium?
Which shielding gas is preferred for manual welding of titanium?
When is helium used in titanium welding?
When is helium used in titanium welding?
Why should the heat affected zones and root side of titanium welds be shielded?
Why should the heat affected zones and root side of titanium welds be shielded?
What does the secondary, or trailing, shield of gas protect during titanium welding?
What does the secondary, or trailing, shield of gas protect during titanium welding?
Why should manufacturer recommendations be followed for electrode, tip grinding, cup size, and gas flow rates?
Why should manufacturer recommendations be followed for electrode, tip grinding, cup size, and gas flow rates?
What is a crucial consideration when repairing an engine mount?
What is a crucial consideration when repairing an engine mount?
How should cracked welds be treated during the repair of an engine mount?
How should cracked welds be treated during the repair of an engine mount?
When should an engine mount be replaced instead of repaired?
When should an engine mount be replaced instead of repaired?
Why are rosette welds used in engine mount repairs?
Why are rosette welds used in engine mount repairs?
When should extensively damaged engine mount rings be repaired?
When should extensively damaged engine mount rings be repaired?
Why is it important to stress relieve an engine mount after weld repairs?
Why is it important to stress relieve an engine mount after weld repairs?
What is the recommended minimum distance between the ends of the inner sleeve and the nearest end of the diagonal cut?
What is the recommended minimum distance between the ends of the inner sleeve and the nearest end of the diagonal cut?
How should the inner and outer replacement tubes be joined to the tube stubs?
How should the inner and outer replacement tubes be joined to the tube stubs?
What should be done to the damaged section of the tube before performing the outer sleeve repair?
What should be done to the damaged section of the tube before performing the outer sleeve repair?
What is recommended to be used wherever possible during the tubing replacement process?
What is recommended to be used wherever possible during the tubing replacement process?
What should be done after cutting two sections of tubing from the inner sleeve material?
What should be done after cutting two sections of tubing from the inner sleeve material?
What should be done before welding the inner sleeve to the tube stubs?
What should be done before welding the inner sleeve to the tube stubs?
