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Effects of Environments and Polarization Potential on the Stress Corrosion Cracking in High-Strength Aluminum Alloys

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 40 Issue 1 Page 27-34
published_at 1989-10
KJ00000156759.pdf
[fulltext] 719 KB
Title
高強度アルミニウム合金の応力腐食割れに及ぼす環境および分極電位の影響
Effects of Environments and Polarization Potential on the Stress Corrosion Cracking in High-Strength Aluminum Alloys
Creators Ohsaki Shuhei
Creators Takahashi Tsuneo
Source Identifiers
Constant extension rate tests were conducted to determine the effects of environment and polarization potential on the stress corrosion cracking (SCC) behaviors in the short-transverse direction of wrought high-strength aluminum alloys 7075 and 7475 in thick sections. The specimens in T6 condition of the alloys reveal a noticeable embrittlement due to SCC when tested in laboratory air, and thus it gives misleading results to employ laboratory air as a reference environment for evaluating SCC susceptibility. The susceptibility can be expressed well in terms of the ratio of the elongation to fracture in a corrosive environment to that in dry nitrogen gas. The SCC behaviors in a NaCl solution, greatly depending on the polarization potential, can be classified into the four potential ranges with the modes of corrosion attack. The high-purity alloy 7475 shows a more enhanced SCC resistance than 7075.
Subjects
機械工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1989-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部