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Re: NDT before or after annealing of tubular products
Posted by: David Tamorron Musu , E-mail: dave@mining.itb.ac.id, on December 16, 2003 at 03:23 :
In Reply to: NDT before or after annealing of tubular products posted by : AMSNDt , E-mail: ams@ndt-inspection.com, on December 15, 2003 at 04:17 :
Dear Mr. AMSNDt,
I did my final project in college about Failure Analysis of Dryer Shell Cracking. The research was done by checking the fracture, test the chemical composition, and simulate the cyclic thermal (Heat Treatment/HT) in the laboratory.
At HT variations (temperature & time), I simulated my specimen by quenching treatment every time after my HT is done. I also took macro & micro photographs, and then counted its boundary size using OPTIMAS 2000 computer program. To check the chemical composition, I used spectrophotometer testing.
Believe it or not... the result is that chemical composition now has different compared to the original one --> I think material selection is not available.
One thing I want sharing in this case of my final project result: HT simulation shows that increasing of thermal cyclic, temperature, and heating time causing reduction of ductility ---> This phenomena known as embrittlement.
Rgrds & God Bless

----------- Start Original Message -----------
: Can someone please direct me to a Standard or Practice that clearly states that NDT should be performed after HT processes or does it matter
: Thanks
------------ End Original Message ------------

Follow Ups:

Re: NDT before or after annealing of tubular products Daniel Rice 07:01 Dec-16-2003 (1)

Re: NDT before or after annealing of tubular products Mehmet Bal 08:50 Dec-16-2003 (0)

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----------- Start Original Message ----------- : Dear Mr. AMSNDt, : I did my final project in college about Failure Analysis of Dryer Shell Cracking. The research was done by checking the fracture, test the chemical composition, and simulate the cyclic thermal (Heat Treatment/HT) in the laboratory. : At HT variations (temperature & time), I simulated my specimen by quenching treatment every time after my HT is done. I also took macro & micro photographs, and then counted its boundary size using OPTIMAS 2000 computer program. To check the chemical composition, I used spectrophotometer testing. : Believe it or not... the result is that chemical composition now has different compared to the original one --> I think material selection is not available. : One thing I want sharing in this case of my final project result: HT simulation shows that increasing of thermal cyclic, temperature, and heating time causing reduction of ductility ---> This phenomena known as embrittlement. : Rgrds & God Bless <dave> : : : Can someone please direct me to a Standard or Practice that clearly states that NDT should be performed after HT processes or does it matter : : Thanks ------------ End Original Message ------------

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