Weld Bend Testing
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Transcript of Weld Bend Testing
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Destructive Examination &
Testing
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Destructive Examination
• Destructive Examination renders the weld
or material unfit for further service.
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Common methods used in
Destructive Examination• Bend testing
• Tensile testing
• Impact testing
• Hardness testing
• Chemical analysis
• Hydrostatic testing to destruction
• eel testing
• !par" testing
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Bend Testing
• Bend test samples are referred to as
#Test Coupons$
• The most common %end tests are & 'uided face and root %end testing
& 'uided side %end testing & (ongitudinal root and side %end testing
& )illet weld %end testing
& *nguided %end testing
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Bend Testing Sample Removal
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Bend Testing Sample Preparation
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Face Bend Testing
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Root Bend Testing
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Side Bend Testing
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Longitudinal Face Bend Testing
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Longitudinal Root Bend Testing
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Fillet Bend Testing
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Pipe Fillet Bend Testing
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Tensile Strength Testing
• #Tensile$ is a test in which a prepared
sample is pulled until the sample %rea"s.
• Test +easurements are recorded in !I,ounds per !-uare Inch E/012 3 /04000 !I Tensile
• Test samples called #Tensile Bolts$ can
reveal a welds Tensile strength4 Elasticlimit4 5ield point4 and Ductility.
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Tensile Strength Testing
• The Elastic Limit of metal is the stress ,load
it can withstand and still return to the original
length after the load is released.
• Yield Strength occurs when the test sample
stretches however will not return to its
original length.• Ductilit is the a%ility of a metal to stretch or
elongate %efore it %rea"s.
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Tensile Testing Strength !raph
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"mpact Testing
• 6n Impact tester uses a heavy pendulum
that is a%le to measure the amount of force
re-uired to shear or fracture a test sampleta"en from welds #Heat 6ffected 7one$
,H67
• Impact testing may %e performed usingeither the "#od or Charp method. ,Both
methods are similar
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"mpact Testing
• 6 Charpy or I8od test measures the welds
a%ility to withstand an "mpact force.
• (ow Charpy test readings indicate %rittle
weld metal
• Higher Charpy readings indicate the
samples toughness.
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$ardness testing
• Hardness may %e defined as the
resistance to permanent indentation.
• Three common hardness measuring
tests are & 9oc"well test
& !cleroscope test
& Brinell
& +icrohardness test
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$ardness testing
• The Roc%ell testing machine operates
somewhat li"e a press4 using a indenter to
penetrate the surface of the test sample.
• The depth of the indentation determines the
materials hardness on a scale of 0:100
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$ardness testing
• The Sceleroscpoe testing machine measures
the amount #%ounce$ that a diamond tip
hammer re%ounds off the test sample after %eing dropped.
• The Brinell method presses the #indenter$
into a sample for a given period of time.• The a%ility for the sample to resist
indentation determines hardness.
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$ardness testing
• 'icrohardness testers allow you to measure
a materials hardness while leaving the least
amount of damage possi%le on the metalssurface.
• 6fter the indenter is used a powerful
microscope is used to determine the theamount of indentation into the components
surface.
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Chemical (nalsis
• Chemical analysis is used in metallurgical
la%oratories to determine the metals grain
and crystalline structures.
• !amples are then place under a high power
microscope to view the results.
• This is referred to as #+etalography$
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$drostatic Testing to Destruction
• ressure testing or lea" testing can %e
performed with either gasses or li-uids.
• ;hen this pressure exceeds the limitations
of the structures design it will rupture under
force.
• This rupture will allow engineers to
understand the welds wea"est areas.
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Peel testing
• (ap
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Spar% Testing
• The shape andcharacteristic of spar"s
created when metal isground will helpdetermine its
properties.
• IE= car%on steel 4 mildsteel.
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)ui# time
• ;hich of the following is a destructive
test >
6= magnet particle
B= tensile testing
C= die penetrate testingD= ultrasonic testing
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)ui# time
• The ??????? type hardness test leaves the least
amount of damage on the metals surface.
6= 9oc"well
B= Brinell
C= !cleroscope
D= +icrohardness
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)ui# time
• ;hen a metal stretches4 %ut dose not %rea" under a
certain load4 this point is called the ?????????
oint.
6= yield
B= tensileC= stretch
D= ultimate strength
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)ui# time
• Ductility is the a%ility of a metal to ????????
%efore it %rea"s.
6= Bend
B= !tretch or elongate
C= Be forged
D= Be indented
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)ui# time
• 6 Charpy test measures a welds a%ility to
withstand ????????? force.
6= Impact
B= Bending
C= enetrating
D= !tretching
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)ui# time
• Hardness may %e defined as the resistance to
??????????>
• Indentation
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'odern *elding Yor% Count School o+ Technolog