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Hello there. Hope this post finds you well. I am welding 0.5 mm thick stainless steel using Fibre laser. I'm consistently getting a burn thru. My joint edges are prepared by Shearing. Any idea of how to weld 0.5 mm thick stainless steel without burn thru. Best Regards Waqas

Hello all. I have a question about the the relationship between the amount of solute content in the molten pool and the degree of constitutional suoercooling. Is there any way that we can say that solute content influences the type of microstructure we get in the fusion zone? Thanx in advance

Hello all. Hope this post finds you well. My question is about general trend of cooling rate observed in welding. Which area of fusion zone experiences highest cooling rate? Weld centre or Fusion line at the end of fusion zone? Thanks all in advance. Best regards.

Hello there. Hope this post finds you well. I am using ANSYS HFSS 13( High frequency structure simulator).Please find attached image from ANSYS. I want to modify this value and remove the exponent portion. I am unable to find how to remove it. Any help shall be highly appreciated. Best...

Hello all. Hope this text finds you all well. I am new to this forum and like to ask question about a matreials concept related to constitutive supercooling. Literature says that this theorey is responsible for explaining the development of different microstuctures during welding or casting...

Hello all. Recently working on D406 Steel. Its a very high strength steel. I do not find much data in ASTM standards about this material. Does any one has any idea what is the origin of this particular steel? Chinese, German or Japanses? Best regards Waqas

Hello all, i am new to this metallurgy forum. I am involved in materials work. I have a question and shall be greatly thankful if anyone rsponds. What are the yield strength and hardness values of 7075-T61? I googled but only found tensile strength. Thank you all

Hi all, recently i completed a project for a company who deals with planes. Unfortunately, there came a pit on the outer surface of the part.. The part is going to fly in air so aerodynamicaly its not acceptable. What i did was that i filled that pit with putty used for painting but the company...

Hi all, i am qualifying welder for groove weld in flat position with backing per AWS D1.2. I have read somewhere that if backing is not to be removed then it must be 3 inch wide atlesat to keep the tack welds away from the radiography area.Also, i have heard that there must be close proximity...

Hi all, i have a question that why only tensile strength is qualified while qualifying any WPS? Some parts may also be under shear stress so why not shear stress at times?

Hi all, what is the best method to macro etch the aluminum weld samples to view different defects like lack of fusion, penetration and porosity etc. How the sample should be cut from a welded plate? Which treatment will make the defects very prominent? Thanx all.

Hi all, can we use files for preparing the aluminum joints if we have to meet x ray quality welds? Can this cause any problem in welding?

Dear all I deal with TIG Welding of hollow cylinders each of 600 mm in diameter. I want to automate the process. I want to design a rotating positioner to rotate the work piece while keeping the torch steady. Hence the resulting position will be 1G. Can anyone help in designing the positioner...

There are different welding codes for procedure qualification and welder qualification like API, ASME Section 9, AWS Standards, European standards. What is the selection criteria for choosing the one? Thanx

Hi all, i am having hard time in understanding this that what should be qualified first and why? procedure qualification or welder qualification? Thanx in advance

Hi all, I have question regarding minimum tensile strength requirement of a tensile test specimen for welding procedure qualification according to ASME Section IX BPVC. The base material i am using is aluminum 6061 T6. For this material the minimum tensile strength requirement as specified by...

Hi all, My question is regarding the use of balled electrode vs tapered electrode in AC Welding of aluminium. I have studied some books which says that balled tungsten electrode produces intense heat source as compared to tapered tungsten electrode. But, recently i have studied some literature...

Hi all, please find the attached page. Its a snapshot from welding metallurgy book of sindo kou. It shows the chemical reactions and products in different envelopes. My question is can i use the outer envelope which releases moisture/water as a product for preheating of aluminum? If not then...

I have asked this question on linkedin but i received no responses so i am copying the same here. Hi all, my workshop is involved in TIG welding of aluminum 2219-O weldment, having diameter 600 mm and length of 500 mm. Joint is prepared by machining which uses cutting lubricants so we clean the...

Hi all, For TIG welding of aluminum i use AC and argon gas. I have learnt that oxide layer must be removed prior to welding and during welding. During welding, oxide layer is removed by sputtering phenomenon,which is that during the positive half cycle of electrode, heavy argon ions knock off...