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[MW:1987] Re: effect of H on notch strength

By Materials & Welding
No, this is notch toughness we are talking about, NOT strength. Toughness
tells us something about energy of fracture, not tensile or yield
strength.Do not confuse the two.

Owen.

----- Original Message -----
From: "JASPAL SINGH" <jaspaldhesi@gmail.com>
To: "Materials & Welding" <materials-welding@googlegroups.com>
Sent: Sunday, April 19, 2009 7:24 AM
Subject: [MW:1983] Re: effect of H on notch strength


This is the effect of hydrogen contents in HAZ Strength

In the HAZ which is having permissible value of Hydrogen there is no
effect on tensile strength as the temprature changes .

But in hydrogen contained HAZ the stress due to hydrogen reaches the
yield point of material when it is in between the temperature of 0 to
100 degree, beyond this temperature again the effect decreases where
hydrogen disassociate and stress due to this decreases , similarly at
lower temperature there is very less activity or we can say movement
of hydrogen which decrease the effect of hydrogen embrittlement.
Diffusion rate is temperature based phenomenon , so there is less
diffusion at lower temperature.

On Apr 18, 3:31 pm, Ali Asghari <asghari...@rocketmail.com> wrote:
> hi
> can anybody explain about this picture?
> rgds.
>
> 2-2.png
> 41KViewDownload

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