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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

@berkshire "Sorry Guys for pushing this off in the wrong direction. Nabeel had asked if weldability on stainless was improved by oxidizing the surface" There is also a mention of elevated temperatures in the original post besides oxidizing the surface.Since I do not know the temperatures so...

Adding to what GTAW said earlier. If corrosion is a problem then use extra low carbon gardes (ELC). Stainless steel has already much less carbon content,making it furthur less will give us extra low carbon grades specified as 304L or 316L. This minimize the chance of sensitizing the stainless...

@Ironicmetallurgist??

Anyone??

Thank you for your response. Please find attached the snapshot from the Welding metallurgy book by Sindo Kou. The slope of a tangent to the equilibrium liquidus line which partitions the planar solidification front from the columnar or dendritic growth region is being given in terms of...

Thank you for the recommendation Dhurjati Sen. I just wanted to ask that how chemical composition influences microstructure. Lets say an Al-Cu system, given two alloys one containing 3 percent copper and other 4 percent copper. Which will have higher tensency for dendritic growth? Thank you

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

Anyone could guide please..

Thanx for comments GTAW and ironic metallurgist. What i know is this. Once the weld pool is formed then solidification occurs in the back half of the pool, opposite to the direction of welding. New crystals will appear on the fusion boundary which is all along in a shape of moon...Not full...

Here is another snapshot from sindo kou book. https://files.engineering.com/getfile.aspx?folder=14f7f5c2-42c2-440f-83fb-87a41856c545&file=Dendrite_arm_spacing..._Reference_from_Sindo_Kou_welding_metallurgy_book.png

I was reading a research article, then the welding metallurgy book by sindo kou. That why i asked because according to my understanding, i found disparity. Please find attached herewith snapshot of research...

Thanx for response Edstainless. I learned and understood from the book this way. Lets say G is temperature gradient and R is the growth rate of solid liquid interface. According to Welding metallurgy book by Sindo Kou, GR defines the cooling rate. At the fusion line, G is maximum but R is...

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.

I want to remove the portion starting from " e" till end. One option is to remove by paint but i want to do it using software ANSYS. Please help

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 Magben. I f you dont mind i have another question regarding this topic. The figure in the same book quotes that "if the actual temperature gradient in the liquid is greater than liqiudus temperature then planar growth is stable" Why the word growth is there, if the actual temperature...

Great. Thankyou Magben. I understand now.

Thanx for your response Magben. Agreed that higher value of G/R is required for stable planar growth. Higher value of G and lower value of R will give us higher value of G/R. This is true if we do not consider the other side of equation as given below. G/R= ΔT/D. About this formula author...

Rightly posted.