T651 is a stress releive after solution treating by stretching. End user must request this to be done based on part geometry and the amount of material to be removed during the machining process. I have seen very few parts that require 6061 T651 as compared to 7075 T7351 which I see all the time.
Thanks to all for your responses. I am certain that these are not stringers or material anomalies. But I still do not know what to call the dark spots. This is not your standard customer and they are requesting clarification on this Macro. My plan is to argue that these sports are artifacts...
I would say the parrallel lines are roughly 3 inches long. My customer required a macro for grain flow. Which at the time of the order, I told them that they would not seen any in this alloy. The first macro I sent them (following standard etching times) did not show any of these anomalies...
Grain size was taken in 8 different areas. Ranges from ASTM #7 (Surface to 1/4T), to Duplex BiModal #5 to #9 (1/4T to 1/2T),to Duplex Wide Range #1 to #9 (Center). This forging was basically a thick upset disk. 22"OD x 16"Thick. It was forged in a pot die to give the OD some conical shape...
My apologies for being unclear. This is a 10" x 10" cross section. It is a macro photo, not a micro photo. Picture was taken from a mounted camera. Photo is not magnified.
Hi All,
I am trying to figure out what to make of the attached picture. This is 625 that has been SA/WQ @ 2000F. You are looking at a 10in. x 10in. section of a forging. First macro (done using standard lab practices) did not show grain flow. I anticipated this because 625 is a clean...
Whats standards/specifications are frac pumps (specifically the fluid end) designed to? Are the producers of these fluid ends performing FEA on their designs in accordance with API 7K and ASME Section VIII Divsion 3, or since the industry basically uses the same design, do they just manufacture...
