Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
(OP)
Is there a relationship between strength and ductility for structural steel? In other words, does the Fu/Fy ratio have any connection to the ductility of a metal? If you take a metal rod with 20% elongation before fracture with a yeild strength of 33 KSI and a tensile strength of 45 KSI, how will these numbers theoretically be affected if the % elongation were, say, 35% instead? Any reference articles would be helfpul!
Thanks,
Jessica
Thanks,
Jessica





RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
Aaron Tanzer
www.lehightesting.com
RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)
I think that it is well understood that even a singe plastic cycle can have a signiifcant influence on material beahviour. - Bauschinger Effects etc.
If you bend it back and forth you will quickly use up any ductility and the work hardening exponent will also have an influence.
By plastically bending a material back and forth you will almost certainly damage the microstructure and change the baisc propeties and significantly effect both fatigue life and impact behaviour. The Fracture Transition temperature will almost certainly increase significantly.