Effect of roller burnishing on the high cycle fatigue performance of the high-strength wrought magnesium alloy AZ80

2005 ◽  
Vol 52 (10) ◽  
pp. 1011-1015 ◽  
Author(s):  
P. Zhang ◽  
J. Lindemann
Keyword(s):  
Magnesium Alloy ◽  
High Cycle Fatigue ◽  
High Strength ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Roller Burnishing ◽  
Wrought Magnesium Alloy

Smooth and notched fatigue performance of aging treated and shot peened ZK60 magnesium alloy

2010 ◽  
Vol 25 (7) ◽  
pp. 1375-1387 ◽  
Author(s):  
Wen-Cai Liu ◽  
Jie Dong ◽  
Ping Zhang ◽  
Xing-Wei Zheng ◽  
Wen-Jiang Ding ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Compressive Residual Stress ◽  
High Cycle Fatigue ◽  
Fatigue Performance ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Notched Specimen ◽  
Notched Specimens ◽  
Zk60 Alloy ◽  
Zk60 Magnesium Alloy

The influence of shot peening (SP) on high cycle fatigue (HCF) performance of smooth and notched specimens of hot-extruded ZK60 magnesium alloy was investigated and compared to that of hot-extruded and T5 aging-treated ZK60 magnesium alloy referred to as ZK60-T5. The increases in fatigue properties at the optimum Almen intensities were found to depend on the material states. In contrast to ZK60 alloy, higher smooth and notched fatigue properties for both unpeened and peened specimens were observed for ZK60-T5 alloy. Meanwhile, the improvement of fatigue life for notched specimen by SP was much more than that for the smooth specimen. The mechanism by which the compressive residual stress induced by SP resulted in the improvement of fatigue performance of smooth and notched specimens for ZK60 and ZK60-T5 alloys was discussed.

Enhanced very high cycle fatigue performance of extruded Mg–12Gd–3Y–0.5Zr magnesium alloy

2011 ◽  
Vol 528 (6) ◽  
pp. 2231-2238 ◽  
Author(s):  
F. Yang ◽  
F. Lv ◽  
X.M. Yang ◽  
S.X. Li ◽  
Z.F. Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
High Cycle Fatigue ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High

Novel Modeling of Mean Stress Effect on the High-Cycle Fatigue Performance of Preloaded Threaded Fasteners

2019 ◽  
Author(s):  
Sayed A. Nassar ◽  
Tianwu Li
Keyword(s):  
Experimental Data ◽  
High Cycle Fatigue ◽  
High Strength ◽  
Fatigue Performance ◽  
Stress Effect ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Mean Stress Effect ◽  
Threaded Fasteners ◽  
Proposed Model

Abstract An experimentally validated model is proposed for the effect of fastener mean stress on its high cycle fatigue (HCF) performance. The model is also used for comparing fatigue performance of ultra-high strength (UHS) fasteners Class 14.8, 15.8 and 16.8 with that of commercially available (CA) Class 10.9 and 12.9 fasteners. Respective mean stress-adjusted S-N curves are constructed using experimental data following applicable ASTM standards. Proposed model results are compared with other existing models that account for the effect of mean stress such as Goodman, Gerber, Morrow, Soderberg, and Elliptic (ASME) models. Detailed discussion of the results, failure mode, and conclusions are provided.

Influence of Post-ECAP TMT on Mechanical Properties of the Wrought Magnesium Alloy AZ80

2008 ◽  
Vol 584-586 ◽  
pp. 858-863 ◽  
Author(s):  
Julia Müller ◽  
Miloš Janeček ◽  
Lothar Wagner
Keyword(s):  
Magnesium Alloy ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Cast Material ◽  
Ecap Processing ◽  
Size Refinement ◽  
Novel Technique ◽  
Wrought Magnesium Alloy ◽  
Thermo Mechanical Treatment ◽  
Hcf Strength

It is well-known that the high-cycle fatigue (HCF) performance of severe plastically deformed wrought magnesium alloys is not as good as one might expect from the significant grain size refinement. Although enhanced HCF strength after ECAP as compared to as-cast material was observed its value was significantly lower than after conventional extruding. The present investigation was undertaken to determine whether the relatively poor HCF strength of the ECAP processed wrought magnesium alloy AZ80 is associated with the ECAP-induced unfavorable crystallographic textures. Post-ECAP thermo-mechanical treatment (TMT) was found to result in favorable texture modifications as well as in markedly improved HCF performance. The proposed novel technique consists of a not yet used combination of severe plastic deformation via ECAP followed by a 1-step swaging process. It is shown that the resulting combination of both ultrafinegrain sized material and beneficial crystallographic texture results in superior HCF performance not achievable by ECAP-processing alone.

scholarly journals Surface Characteristics and High Cycle Fatigue Performance of Shot Peened Magnesium Alloy ZK60

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Dong ◽  
Wencai Liu ◽  
Wenjiang Ding ◽  
Jianxin Zou
Keyword(s):  
Magnesium Alloy ◽  
Shot Peening ◽  
High Cycle Fatigue ◽  
Crack Nucleation ◽  
Surface Characteristics ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Fatigue Crack Nucleation ◽  
Zk60 Alloy ◽  
Zk60 Magnesium Alloy

The current work investigated the effect of shot peening (SP) on high cycle fatigue (HCF) behavior of the hot-extruded ZK60 magnesium alloy. SP can significantly improve the fatigue life of the ZK60 alloy. After SP at the optimum Almen intensities, the fatigue strength at 107 cycles in the as-extruded (referred to as ZK60) and the T5 aging-treated (referred to as ZK60-T5) alloys increased from 140 and 150 MPa to 180 and 195 MPa, respectively. SP led to a subsurface fatigue crack nucleation in both ZK60 and ZK60-T5 alloys. The mechanism by which the compressive residual stress induced by shot peening results in the improvement of fatigue performance for ZK60 and ZK60-T5 alloys was discussed.

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