NDLI: S-N Fatigue Behavior of Anodized 7050-T7451 Produced in Different Electrolytes

Content Provider	Springer Nature Link
Author	Lee, Eungyeong Jeong, Yooin Kim, Sangshik
Copyright Year	2011
Abstract	The effect of anodizing layers processed in different electrolytes of chromic acid (chromic acid anodizing [CAA]), sulfuric acid (sulfuric acid anodizing [SAA]), and tartaric acid (tartaric acid anodizing [TAA]) on the S-N fatigue behavior of the 7050-T7451 specimen was examined. The fatigue tests were conducted at an R ratio of 0.1 and at three different stress levels of 200, 220, and 270 MPa. Some specimens were exposed to continuous salt spraying of 5 pct NaCl solution for 336 hours and subsequently fatigue tested at an applied stress of 200 MPa. The detrimental effect of anodizing on the S-N fatigue resistance of 7050-T7451 was observed. The fatigue resistance varied with different anodizing electrolytes particularly at low stress with the greatest resistance for the TAA followed by CAA and SAA. The fractographic and micrographic observations showed the morphological difference in each anodized layer, which seemed to determine the ease of crack initiation and the resistance to S-N fatigue. The resistance to S-N fatigue of anodized 7050-T7451 specimens was, for example, affected strongly by the nature of preanodized layer with different acid-pickling processes. The pits found in the pre-CAA specimens seemed to be slightly irregular and deeper than those in the pre-TAA counterparts, reducing the fatigue resistance of the 7050-T7451 specimens. The CAA, SAA, and TAA specimens showed similar resistance to corrosion plus fatigue.
Starting Page	2002
Ending Page	2011
Page Count	10
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	43
Issue Number	6
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2012-01-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanotechnology Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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