Re: [MW:20010] Re: Side wall lack of fusion

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When we are talking for LOF we have to consider that this is a planar defect (two dimensional).
LOF occurs when the heat input is not enough to assure a fusion of the base metal.
In that case weld metal is just deposited on the base metal just like in the case of brazing.

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sandeep Kumar ---03/02/2014 14:03:44---Dear Its seems that you are confused with LOF.

From: sandeep Kumar <sandeepdhiman63@gmail.com>
To: materials-welding@googlegroups.com
Date: 03/02/2014 14:03
Subject: Re: [MW:19987] Re: Side wall lack of fusion
Sent by: materials-welding@googlegroups.com

---

Dear

Its seems that you are confused with LOF.
Lets not discuss about your report, but please note that if you are able to see complete fusion between the parent metal and weld metal, with a magnification of say 20X(IN general) , there is no lack of fusion.
Lack of fusion refer to completely separation of two areas i.e. weld metal and parent metal.
Refer this link for an example. http://dc193.4shared.com/doc/2egtQlq2/preview_html_m2671764e.png


regards
Sandeep Kumar

On Sunday, February 2, 2014 1:24:16 AM UTC+5:30, sara vana wrote:
Dear experts,

Sorry for the late reply.
We cant afford for NDT.
Also UT is not possible due to the profile of the job.
But we have an internal testing lab where i could do a destructive testing free of cost.

Please find the attachments with respect to the macro test which we have conducted.

After etching the weld test piece we have drawn a triangle from the weld centre line with included triangle 60 degree.

Our lab report tells if L>12mm & A>1mm then it is a proper fused weld.

If L<11mm & A<1mm then there is a side wall lack of fusion.

Please give your comments Is IT correct or not?

with regards,
Saravanan




On Mon, Jan 20, 2014 at 2:45 AM, Mohammad abu eassa <mr.moham...@gmail.com> wrote:

you can get it easy using UT


On Thursday, 9 January 2014 10:50:28 UTC-8, sara vana wrote:
Dear experts,

How to measure side wall lack of fusion by destructive testing.
Component : butt welding of plates
Joint configuration : groove weld with included angle sixty degree

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