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Effect of Homogenization on the Pitting Corrosion Behavior of Al-Li-Cu Alloys

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 43 Issue 1 Page 7-12
published_at 1992-10
KJ00000156903.pdf
[fulltext] 533 KB
Title
Al-Li-Cu 系合金の孔食挙動に及ぼす均質化処理の影響
Effect of Homogenization on the Pitting Corrosion Behavior of Al-Li-Cu Alloys
Creators Ohsaki Shuhei
Creators Takahashi Tsuneo
Source Identifiers
Effect of homogenization on the pitting corrosing of Al-Li-Cu and Al-Li-Cu-Zr casting alloys were investigated metallurgically and electrochemically. Three types of inclusions, Al-Cu, Al-Fe and Si-rich compounds, were observed among dendrite arms. The only Al-Cu compounds could be solutionized with homogenization at 793K, but remained even after the treatment for 86.4ks. An anodic Al-Cu compound which may be T_2(Al_6Li_3Cu) phase dissolved in the early stage of immersion. For the alloys as-cast or homogenized unitl 0.6ks, the pitting potential changed in the noble direction with the increase of homogenization time, and the pitting attack ocurred preferentially inside of the cored structure with a lower Cu concerntration than outside. On the other hand, the alloys homogenized for the longer time exhibited a nearly constant pitting potential -670mV, and the pitting took place at adjacent region to Al-Fe compound particles.
Subjects
機械工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1992-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部