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Dynamic fracture behaviour of simulated weld heat affected zone of a high strength low alloy steel
Author(s) -
Lei WeiSheng,
Su Yan,
Yao Mei
Publication year - 1996
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199605536
Subject(s) - materials science , fracture toughness , welding , alloy , metallurgy , fracture (geology) , heat affected zone , dislocation , composite material , deformation (meteorology) , high strength low alloy steel , toughness , fracture mechanics
Fracture toughness properties of a simulated weld coarse grain heat affected zone (CGHAZ) in a newly developed 785 MPa grade high strength low alloy (HSLA) steel were investigated at different loading rates and a series of temperatures. It is indicated that the fracture toughness K Ic is a single‐value function of the parameter Δ H = kT In ( A /ε̇), implying that just like the plastic deformation, the event of fracture initiation is also controlled by dislocation thermal activation movement.