Podcast
Questions and Answers
What is the term for the removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side?
What is the term for the removal of weld metal and base metal from the weld root side of a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side?
- Underfill
- Concavity
- Overlap
- Backgouging (correct)
Which discontinuity results from an arc, consisting of any localized remelted metal, heat-affected metal, or change in the surface profile of any metal object?
Which discontinuity results from an arc, consisting of any localized remelted metal, heat-affected metal, or change in the surface profile of any metal object?
- Porosity
- Slag inclusions
- Arc strike (correct)
- Cracking
What is the term for a weld discontinuity characterized by an excessive weld reinforcement?
What is the term for a weld discontinuity characterized by an excessive weld reinforcement?
- Dimensional Errors
- Incomplete Fusion
- Convexity (correct)
- Surface Irregularities
Which discontinuity refers to a localized cavity or tunnel type discontinuity?
Which discontinuity refers to a localized cavity or tunnel type discontinuity?
What is the term for the discontinuity resulting from entrapped gas in the weld metal or between the weld and base metal?
What is the term for the discontinuity resulting from entrapped gas in the weld metal or between the weld and base metal?
Which discontinuity is characterized by a break in the solid metal caused by stress exceeding the metal's ultimate strength?
Which discontinuity is characterized by a break in the solid metal caused by stress exceeding the metal's ultimate strength?
What is the definition of 'depth of fusion' in welding?
What is the definition of 'depth of fusion' in welding?
What is the purpose of 'backing' in welding?
What is the purpose of 'backing' in welding?
What does 'nondestructive testing (NDT)' refer to in welding?
What does 'nondestructive testing (NDT)' refer to in welding?
What is the characteristic of a 'crack' in welding?
What is the characteristic of a 'crack' in welding?
What is the definition of 'ductility' in welding?
What is the definition of 'ductility' in welding?
What is the definition of 'complete joint penetration (CJP)' in welding?
What is the definition of 'complete joint penetration (CJP)' in welding?
What can excessive root opening cause in welding?
What can excessive root opening cause in welding?
What can misalignment of parts cause in welding?
What can misalignment of parts cause in welding?
What does water jet cutting not produce, making it suitable for welding?
What does water jet cutting not produce, making it suitable for welding?
What should be consulted before cutting and material preparation begins in welding?
What should be consulted before cutting and material preparation begins in welding?
What can irregularities in the finished surface to be welded lead to?
What can irregularities in the finished surface to be welded lead to?
What do sheared surfaces in welding may lead to?
What do sheared surfaces in welding may lead to?
What is the ultimate tensile strength of a material?
What is the ultimate tensile strength of a material?
What is the yield strength of a material?
What is the yield strength of a material?
What is the purpose of a welding procedure?
What is the purpose of a welding procedure?
What are weld discontinuities divided into?
What are weld discontinuities divided into?
What is the definition of slag in welding?
What is the definition of slag in welding?
What is the purpose of relevant codes and standards in welding?
What is the purpose of relevant codes and standards in welding?
What is the recommended inspection method after overlap repair to ensure complete removal and detect hidden overlap?
What is the recommended inspection method after overlap repair to ensure complete removal and detect hidden overlap?
What is the maximum distance from the face of a convex fillet weld perpendicular to a line joining the weld toes called?
What is the maximum distance from the face of a convex fillet weld perpendicular to a line joining the weld toes called?
What is the probable cause of excessive weld reinforcement in groove welds?
What is the probable cause of excessive weld reinforcement in groove welds?
What is overlap in welding?
What is overlap in welding?
What is the essential purpose of material inspection upon receipt?
What is the essential purpose of material inspection upon receipt?
What is the consequence of excessive convexity in single pass fillet welds?
What is the consequence of excessive convexity in single pass fillet welds?
Flashcards
Backgouging
Backgouging
Removal of weld metal and base metal from the weld root side to ensure complete fusion and penetration upon subsequent welding.
Arc Strike
Arc Strike
A localized remelted metal, heat-affected metal, or change in surface profile caused by an arc.
Convexity
Convexity
A weld discontinuity characterized by excessive weld reinforcement.
Undercut
Undercut
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Porosity
Porosity
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Cracking
Cracking
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Depth of Fusion
Depth of Fusion
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Backing
Backing
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Nondestructive Testing (NDT)
Nondestructive Testing (NDT)
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Crack
Crack
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Ductility
Ductility
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Complete Joint Penetration (CJP)
Complete Joint Penetration (CJP)
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Excessive Root Opening Cause
Excessive Root Opening Cause
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Misalignment of Parts Cause
Misalignment of Parts Cause
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Water Jet Cutting Doesn't Produce
Water Jet Cutting Doesn't Produce
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Consult Before Cutting
Consult Before Cutting
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Irregularities in the Finished Surface Lead To
Irregularities in the Finished Surface Lead To
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Sheared Surfaces May Lead To
Sheared Surfaces May Lead To
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Ultimate Tensile Strength
Ultimate Tensile Strength
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Yield Strength
Yield Strength
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Purpose of Welding Procedure
Purpose of Welding Procedure
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Weld Discontinuities Divided
Weld Discontinuities Divided
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Slag
Slag
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Purpose of Codes and Standards
Purpose of Codes and Standards
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Recommended Inspection Method After Overlap Repair
Recommended Inspection Method After Overlap Repair
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Maximum Distance/Convex Fillet Weld
Maximum Distance/Convex Fillet Weld
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Probable Cause of Excessive Weld Reinforcement
Probable Cause of Excessive Weld Reinforcement
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Overlap in Welding
Overlap in Welding
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Essential Purpose of Material Inspection
Essential Purpose of Material Inspection
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Consequence of Excessive Convexity
Consequence of Excessive Convexity
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Study Notes
Welding Defects and Corrective Measures
- Prior knowledge of code and procedure requirements is crucial for informed decisions on cutting and preparation methods.
- Material inspection upon receipt is essential to ensure proper type, grade, and acceptable condition.
- Requesting Mill Certificates for ordered material helps in verifying the type and grade received.
- Machinists aware of required tolerances are more likely to adhere to requirements and identify problems early in material preparation.
- Overlap is an excess of weld metal at the toe of a weld, causing stress concentration and masking incomplete fusion.
- Probable causes of overlap include operator technique, electrode size, welding parameters, and surface contaminants.
- Proper welding procedures and techniques should prevent overlap, and if it occurs, grinding and blending can correct it.
- Magnetic particle testing (MT) is recommended after overlap repair to ensure complete removal and detect hidden overlap.
- Convexity is the maximum distance from the face of a convex fillet weld perpendicular to a line joining the weld toes.
- Excessive convexity in single pass fillet welds adds stress risers, while in multipass welds, it may lead to other discontinuities.
- Probable causes of convexity are operator technique, electrode size, welding parameters, and surface contaminants.
- Excessive weld reinforcement stiffens the section, establishes notches, and increases weight in groove welds. Proper welding procedures and techniques should prevent excessive weld reinforcement.
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