[MW:2011] Re: effect of H on notch strength

Ali,

No we did not. We said that NOTCH toughness is something completely different from STRENGTH, of which there are several versions, viz. ultimate and  yield in tension, compression, bending and torsion. THERE IS NO SUCH PARAMETER AS "NOTCH STRENGTH" - you've invented that one yourself.

 

Please go back, re-read the earlier emails, then re-read them again. If you still can't understand them, please ask a question which shows that you have, at least read the earlier emails and tried to understand them.

 

There are a number of good websites which may be able to help you if you do not understand strength of materials. Here's one for a start: http://www.engineersedge.com/strength_of_materials.htm . If you want to understand the phenomenon of hydrogen embrittlement, you might try the Corrosion Doctors website or the KSC Corrosion lab.

 

Regards,

Owen.

----- Original Message -----

From: Ali Asghari

To: materials-welding@googlegroups.com

Sent: Wednesday, April 22, 2009 10:41 AM

Subject: [MW:2010] Re: effect of H on notch strength

hi chaps

do you say ,the notch strength is similar to tensile strength?if it is true,why tha strength in 200 is more than 50?

rjd

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From: babu k <kbabupsg@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, April 21, 2009 6:43:28 PM
Subject: [MW:2000] Re: effect of H on notch strength

Chaps,

 

Please find the attachment, hopefully clarify the things,

 

 

On Tue, Apr 21, 2009 at 7:36 PM, Ali Asghari <asghariali@rocketmail.com> wrote:

hi oven

thank you for answer,but i dont understand yet.

because the toughness in -100 is more than in 50,why?

another question:this figure is true in all steel?

regard advance

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From: Owen Jenkins <owen@osjl.co.uk>

To: materials-welding@googlegroups.com

Sent: Sunday, April 19, 2009 12:20:17 PM
Subject: [MW:1985] Re: effect of H on notch strength

Ali,

The top line shows the toughness of the base material without hydrogen embrittlement occurring - toughness increases steadily with increasing temperature.

 

The lower, V-shaped line shows that the effect of hydrogen embrittlement is worst at about 50°C, decreasing rapidly as the temperature increases (and the ability of the hydrogen to diffuse out of the metal increases) and also decreasing at lower temperatures, where reaction rates are much lower and the density of hydrogen increases, hence its volume decreases.

 

Other may wish to add more to this simple approach. Does this help?

 

Regards,

Owen.

----- Original Message -----

From: Ali Asghari

To: materials-welding@googlegroups.com

Sent: Saturday, April 18, 2009 11:31 AM

Subject: [MW:1980] effect of H on notch strength

hi

can anybody explain about this picture?

rgds.

---

--
Thanks & regards,

K.Babu
Welding Engineer,
PPL Shipyard Pte Ltd
Singapore
HP:  +65 94815990
Skype: psgbabu


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