What happens to the Fe in FM Brass as the result of soldering? It's been too long since Materials Science class. I know that the Fe content is very low but I am wondering if the Fe comes out of solution and migrates to the surface of the part that I am soldering. Just a guess.
Jerry
I have determined the clamped material stiffness through FEA because it does not conform to the traditional conical frusta. The bolt's stiffness can be determined by k_bolt=(A*E)/L. Knowing the bolt and clamped material stiffness's I can determine the joint stiffness to be...
I want to thank you all for your insights on this topic. From Shigley "Contrary to first impressions, the subject is one of the most interesting in the entire field of mechanical design".
Thank you 3DDave. I use the simplified equation as a first pass for design and then test as you have astutely pointed out. If my test results aren't even remotely close to that predicted then I know something is wrong. There are just too many unknowns.
The hole is drilled axially, not radially. I find it hard to believe you have never seen a bolt with an axially drilled thru hole. Regardless; Assume you just have just seen one. How would you advise your client? Would you state that the hole can be as large as physically possible with no...
It is critical that the cross sectional area of the modified bolt be considered. The maximum force that the bolt can withstand is dependent on its material properties and cross sectional area. Stress = Force divided by Area. The allowable force in the modified bolt is the allowable stress...
I have reduced the force based on the reduced TSA. Based on your responses "d" is the original major diameter.
Therefore: T = k x F(allowable reduced area force) x actual major diameter.
I want to specify the torque on a bolt with an axially drilled thru hole. I am subtracting the thru hole area from the tensile stress area(TSA) to get a modified TSA. Traditionally I use the equation T=kFd to determine the torque. What value of "d" do I use with the modified bolt? Is it the...
Use 6063-T5. That's what most extruders use. Plus the thermal conductivity is approx 205 versus 180 for 6061-T6. There are trade offs. 6063 extrudes easier that 6061. 6063 has higher thermal conductivity. 6061 machines easier than 6063.
Thanks to all who have contributed to my understanding of this phenomenon. Just to qualify my efforts, I did refer to my Mat Sci text book and it did help but not to the level that I needed. I've also used the web to do as much research as possible before posting.
So, my understanding is...
I had an energy dispersive spectroscopy analysis of the white powder residue on the screw done and it indicated the presence of Al, O, and Cl. Their conclusion was that it was a chlorine/chloride induced corrosion residue.
The aluminum is struck/flashed with copper prior to silver plating. I...
I'm looking at the MIL-STD-889 galvanic table and there are passive and active stainless steels. What is the difference? Since I have an application involving stainless screws in an aluminum body I would prefer to use the active stainless as it is closer to the aluminum on the table.
Are...
All of the units were in the same orientation in the test chamber.
The Al housings are silver plated but there is very little if any plating in the M$ screw holes where the corrosion was found. Interestingly, the corrosion was so severe on one unit as to migrate out from the hole and appear on...
