Grain Boundary Morphology Evolution in Low Cycle Fatigue of High Purity Aluminum

2019 ◽  
Author(s):  
J. Kacher ◽  
W. Lanning ◽  
C. Muhlstein ◽  
X. Wang
Keyword(s):  
Grain Boundary ◽  
High Purity ◽  
Low Cycle Fatigue ◽  
Morphology Evolution ◽  
Cycle Fatigue ◽  
High Purity Aluminum

Investigation on Fatigue Damage of the Al5Zn2Mg High Strength Aluminum Alloy

2013 ◽  
Vol 721 ◽  
pp. 12-15 ◽  
Author(s):  
Xian Liang Sun ◽  
Ai Qin Tian ◽  
Wen Bin Chen ◽  
San San Ding ◽  
Shang Lei Yang
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Grain Boundary ◽  
Fatigue Fracture ◽  
Low Cycle Fatigue ◽  
High Strength ◽  
Alloy Sample ◽  
Cycle Fatigue ◽  
High Strength Aluminum Alloy ◽  
Propagation Zone

The fatigue fracture and the microstructure of Al5Zn2Mg high strength aluminum alloy were observed by OM, SEM and TEM, and the low cycle fatigue properties were tested and analyzed. The results of experimentation show that the low cycle fatigue life of Al5Zn2Mg high strength aluminum alloy is 9.28×104 cycle in R=0.1, f=8Hz, and σmax=0.75σb. The tensile strength is 444MPa. The fatigue fracture is composed of the initiation zone, the propagation zone, and the sudden fracture zone, which is characteristic of a mixed-type fatigue fracture. The fatigue crack initiates in the surface of Al5Zn2Mg aluminum alloy sample, while there is no fatigue striation in fatigue crack propagation zone. The η′(MgZn2) transitional strengthening phases are precipitated in Al5Zn2Mg aluminum alloy, and mostly distributed in grain boundary. The diameter of η′ strengthening phase is fine, about is 10nm. There is none precipitated zone in width nearby the grain boundary

scholarly journals High Temperature Low-cycle Fatigue Properties and Grain Boundary Configuration in an Austenitic Heat Resisting Steel

1983 ◽  
Vol 69 (1) ◽  
pp. 97-106 ◽  
Author(s):  
Masaru YAMAMOTO ◽  
Yasushi HORIUCHI ◽  
Ohmi MIYAGAWA ◽  
Dai FUJISHIRO
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Low Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue

Initiation from Low Cycle Fatigue to Gigacycle Fatigue

2014 ◽  
Vol 891-892 ◽  
pp. 1419-1423 ◽  
Author(s):  
Claude Bathias ◽  
Chong Wang
Keyword(s):  
Fatigue Crack ◽  
Grain Boundary ◽  
Armco Iron ◽  
Low Cycle Fatigue ◽  
Point Of View ◽  
Cycle Fatigue ◽  
Physical Point ◽  
Mechanical Aspect

This paper is devoted to the initiation of fatigue crack in Armco iron from low cycle fatigue to gigacycle fatigue. It is shown that the basic mechanisms of initiation are very similar from a physical point of view: PSB and Grain boundary cracking. But the mechanical aspect is specific in LCF and in GCF.

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