CORROSION BEHAVIOR OF 8090 AL-LI ALLOY

被引：14

作者：

HU, ZQ ^{[1
]}

ZHANG, Y ^{[1
]}

LIU, YL ^{[1
]}

ZHU, ZY ^{[1
]}

机构：

[1] ACAD SINICA,INST CORROS & PROTECT MET,SHENYANG 110015,PEOPLES R CHINA

来源：

CORROSION | 1993年 / 49卷 / 06期

关键词：

ALUMINUM-LITHIUM ALLOY; CORROSION RESISTANCE; EXFOLIATION CORROSION; INTERGRANULAR CORROSION; RETROGRESSION AND REAGING TREATMENT; STRESS CORROSION CRACKING;

D O I：

10.5006/1.3316078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An evaluation was conducted of the corrosion behavior of 8090 aluminum-lithium (Al-Li) alloy (UNS A98090), when aged under various conditions and subjected to corrosion in a solution of 3.5% NaCl + 1% H2O2. Susceptibility to pitting, intergranular corrosion, and exfoliation corrosion was shown to be influenced by heat treatment, which reduced from natural aging, through overaging to peak aging. Materials with peak aging showed low corrosion resistance. The decreased corrosion resistance corresponded to decreased corrosion potential of the alloy. Insoluble constituents were susceptible to corrosion. The corrosion extended along grain boundaries. Al-Li alloys showed mismatched tensile strength and stress corrosion resistance. The growth rate of stress corrosion cracks was large in the peak-aged state. The growth rate was strengthed by overaging, but tensile strength was reduced. That problem was solved by retrogression and reaging processing.

引用

页码：491 / 498

页数：8

共 15 条

[1] EFFECTS OF ENVIRONMENT AND MICROSTRUCTURE ON STRESS-CORROSION CRACK-PROPAGATION IN AN AL-LI-CU-MG ALLOY [J].

AHMAD, M .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1990, 125 (01) :1-14

[2]

AHMAD M, 1987, 4TH P INT AL LITH AL, P871

[3]

Cina B.M., 1974, US Patent, Patent No. [3,856,584, 3856584]

[4] STRESS-CORROSION CRACKING BEHAVIOR OF AN ALLICUMG ALLOY [J].

DORWARD, RC ;

HASSE, KR .

CORROSION, 1987, 43 (07) :408-413

[5]

FLOWER HM, 1987, MATER SCI TECH SER, V3, P81, DOI 10.1179/026708387790123016

[6]

GRAY A, 1989, ALUMINUM LITHIUM, V5, P1175

[7]

HAN DJ, 1981, ALUMINIUM, V57, P737

[8]

LAVERNIA EJ, 1990, J MATER SCI, V25, P1137

[9]

LIU YL, 1992, THESIS ACADEMIA SINI

[10] IMPROVEMENT OF FRACTURE-TOUGHNESS IN 7475 ALUMINUM-ALLOY BY THE RRA (RETROGRESSION AND RE-AGING) PROCESS [J].

OHNISHI, T ;

IBARAKI, Y ;

ITO, T .

MATERIALS TRANSACTIONS JIM, 1989, 30 (08) :601-607

← 1 2 →