Evaluating stress corrosion cracking behaviour of high strength AA7075-T651 aluminium alloy

Journal of the Mechanical Behavior of Materials

Rajakumar S.¹  Balasubramanian V.¹  Lakshminarayanan A.K.²  Prabhuraj P.³ 

[1] Department of Manufacturing Engineering, Centre for Materials Joining and Research (CEMAJOR), Annamalai University, Annamalai Nagar, Tamil Nadu, India;Department of Mechanical Engineering, SSN College of Engineering, Chennai, Tamil Nadu, India;Research Scholar, Department of Manufacturing Engineering, Centre for Materials Joining and Research (CEMAJOR), Annamalai University, Annamalai Nagar – 608 002, Tamil Nadu, India, Tel.: [phone];

关键词: high strength aluminium alloy;    microstructure;    pitting corrosion;    stress corrosion cracking;   

DOI  :  10.1515/jmbm-2017-0019

来源: DOAJ

【 摘 要 】

The objective of the present study is to determine the threshold stress level of stress corrosion cracking (SCC) in AA7075-T651 aluminium alloy by suitable experimentation. The test was carried out using a circumferential notch specimen in a horizontal-type constant load SCC setup in a 3.5 wt.% NaCl solution. The time to failure by SCC was determined at various loading conditions. The threshold stress of AA7075-T651 alloy was found to be 242 MPa in a 3.5 wt.% NaCl solution. The various regions of the fractured surface specimen such as machined notch, SCC region and final overload fracture area were examined using scanning electron microscopy (SEM) in order to identify the SCC mechanism.

【 授权许可】

Unknown