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Kujawski, D.

Latanision, R.

Vasudevan, Asuri

English

Engineering Conferences International

FRACTURE TOUGHNES K1c AFFECTING STATIC THRESHOLD K1scc  A.K.Vasudevan, TDA Inc, USA akruva@gmail.com D.Kujawski, Western Michigan University, USA  R.Latanision, Exponent Inc, Boston, USA   It is common to observe that monotonic K1c (lab air) and K1scc (NaCl solution) decrease with increasing YS of an alloy. K1c is measured in Lab Air and K1scc in an aqueous solution such as NaCl. It is noted that K1c is not considered as a subcritical parameter while K1scc is. Interestingly, for a given alloy, both these parameters seem to be inter-related. That is, K1scc is linearly  related to K1c, such that K1scc increases with increasing K1c. This may indicate that plasticity is affecting the K1scc behavior. This article looks into the conditions that affect K1scc for steels, Al-alloys and Ti-alloys. This linear variation of K1scc with K1c seem to be independent of alloy YS, E, microstructure and work hardening rate. This observation seems similar in all three systems of alloys.  The question is how much of this behavior is related to chemistry at the crack tip in 3.5%NaCl solution for a given K1c? Does plasticity ahead at the crack tip affect the reaction rate of the chemistry? What could be a plausible explanation: anodic dissolution under stress or HAC?.   

Fracture toughnes K1c affecting static threshold K1scc

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1028&context=eac6&type=additional

Fracture toughnes K1c affecting static threshold K1scc

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Engineering Conferences International