Influence of heat treatments on the stress corrosion cracking susceptibility of 7075 aluminum wires in NaCl solutions | Zendy

Schnatterer C. | Zendy; Zander D. | Zendy

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Influence of heat treatments on the stress corrosion cracking susceptibility of 7075 aluminum wires in NaCl solutions

Author(s) -

Schnatterer C.,

Zander D.

Publication year - 2016

Publication title -

materials and corrosion

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 55

eISSN - 1521-4176

pISSN - 0947-5117

DOI - 10.1002/maco.201608978

Subject(s) - stress corrosion cracking , materials science , intergranular corrosion , hydrogen embrittlement , corrosion , metallurgy , alloy , cracking , aluminium , ultimate tensile strength , environmental stress fracture , stress (linguistics) , hydrogen , composite material , chemistry , linguistics , philosophy , organic chemistry

The influence of heat treatments on the stress corrosion cracking susceptibility (SCC) of industrially drawn 7075 wires was investigated in 2 wt% NaCl solution at a pH of 3. The T4 treated material showed the highest susceptibility, whereas the T6 treated alloy showed a reduced sensitivity to SCC. Over‐aging was found to reduce SCC susceptibility most effectively. The high susceptibility of the T4 treated material was proposed to be a result of the strong intergranular corrosion attack during testing, reducing the loaded cross‐section of the tensile specimen and increasing the stress level. The fatal crack formation is proposed to be a result of hydrogen embrittlement by the evolved hydrogen.

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