Investigating the Benefits of Controlled Shot Peening on Corrosion Fatigue of Aluminium Alloy 2024 T351

Shot Peening ◽  
2006 ◽  
pp. 264-270 ◽  
Author(s):  
Sean A. Curtis ◽  
Eduardo R. de los Rios ◽  
Chris A. Rodopoulos ◽  
Jose Solis Romero ◽  
Andrew Levers
Keyword(s):  
Aluminium Alloy ◽  
Corrosion Fatigue ◽  
Shot Peening

Surface Modification Analysis after Shot Peening of AA 7075 in Different States

2013 ◽  
Vol 768-769 ◽  
pp. 519-525 ◽  
Author(s):  
Sebastjan Žagar ◽  
Janez Grum
Keyword(s):  
Residual Stress ◽  
Surface Layer ◽  
Residual Stresses ◽  
Aluminium Alloy ◽  
Shot Peening ◽  
Fatigue Testing ◽  
Stress Profile ◽  
Treatment Conditions ◽  
Stress Profiles ◽  
Compressive Residual Stresses

The paper deals with the effect of different shot peening (SP) treatment conditions on the ENAW 7075-T651 aluminium alloy. Suitable residual stress profile increases the applicability and life cycle of mechanical parts, treated by shot peening. The objective of the research was to establish the optimal parameters of the shot peening treatment of the aluminium alloy in different precipitation hardened states with regard to residual stress profiles in dynamic loading. Main deformations and main residual stresses were calculated on the basis of electrical resistance. The resulting residual stress profiles reveal that stresses throughout the thin surface layer of all shot peened specimens are of compressive nature. The differences can be observed in the depth of shot peening and the profile of compressive residual stresses. Under all treatment conditions, the obtained maximum value of compressive residual stress ranges between -200 MPa and -300 MPa at a depth between 250 μm and 300 μm. Comparison of different temperature-hardened aluminium alloys shows that changes in the Almen intensity values have greater effect than coverage in the depth and profile of compressive residual stresses. Positive stress ratio of R=0.1 was selected. Wöhler curves were determined in the areas of maximum bending loads between 30 - 65 % of material's tensile strength, measured at thinner cross-sections of individual specimens. The results of material fatigue testing differ from the level of shot peening on the surface layer.

Influence of combined shot peening and PEO treatment on corrosion fatigue behavior of 7A85 aluminum alloy

2019 ◽  
Vol 486 ◽  
pp. 72-79 ◽  
Author(s):  
Zuoyan Ye ◽  
Daoxin Liu ◽  
Xiaohua Zhang ◽  
Zhiyong Wu ◽  
Fei Long
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Fatigue ◽  
Shot Peening ◽  
Fatigue Behavior ◽  
7A85 Aluminum Alloy

ENHANCEMENT OF EXFOLIATION CORROSION RESISTANCE OF ALUMINIUM ALLOY 5083 BY SHOT PEENING

2018 ◽  
Vol 25 (07) ◽  
pp. 1950020
Author(s):  
A. VINOTH JEBARAJ ◽  
L. AJAYKUMAR ◽  
C. R. DEEPAK ◽  
K. V. V. ADITYA
Keyword(s):  
Corrosion Resistance ◽  
Aluminium Alloy ◽  
Shot Peening ◽  
Roughness Parameters ◽  
X Ray Diffraction ◽  
X Ray ◽  
Exfoliation Corrosion ◽  
Marine Applications ◽  
Textural Changes ◽  
Chloride Environment

The present work is an effort to study the influence of shot peening on the exfoliation corrosion behavior of aluminium alloy (AA) 5083. Surface textural changes induced by shot peening was characterized using microstructural and X-ray diffraction analysis. The surface roughness parameters were measured to study the benefits of peening induced surface topography. Further, the hardness survey was carried out to assess the severe plastic deformation on the peened layers. As a result, excellent resistance against exfoliation corrosion was achieved in the chloride environment. Shot peening plays major role in enhancing the corrosion resistance of AA 5083. In the absence of exfoliation attack, the unpeened sample surfaces such as ground, milled, and as received conditions end up with a significant pitting attack. The findings of this work will be useful for the aluminium alloy fabrications involved in the marine applications.

Fatigue of Unmachined Aluminium Alloy Extrusions

1962 ◽  
Vol 13 (3) ◽  
pp. 271-274 ◽  
Author(s):  
K. W. Gunn ◽  
A. R. Woodward
Keyword(s):  
Laboratory Test ◽  
Aluminium Alloy ◽  
Shot Peening ◽  
Copper Alloys ◽  
High Strength ◽  
Fatigue Properties ◽  
Test Pieces ◽  
Compressive Stresses ◽  
Aluminium Copper ◽  
Effect Of Surface

SummaryThe fatigue properties of unmachined extrusions of high-strength aluminium-copper alloys are known to be lower than those of conventional fully-machined test pieces. Work described in this note has shown that the removal of a layer of metal 0·025 in. thick from the surface of B.S. L65-type extrusions results in an increase in fatigue properties to values approaching those obtained from the conventional laboratory test pieces. Because the removal of material from the surface is not always a practical proposition, other methods of improving strength have been examined and the effect of surface compressive stresses has been shown to be beneficial. Sufficient compressive stress can be induced by surface-rolling to increase the fatigue properties to those of conventional specimens, but this method can only be easily applied to round sections and it is suggested that shot-peening or vapour-blasting could be used for more complicated sections.

scholarly journals Study of Relation between Shot Peening Parameters and Fatigue Fracture Surface Character of an AW 7075 Aluminium Alloy

Metals ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 111 ◽  
Author(s):  
Libor Trško ◽  
Stanislava Fintová ◽  
František Nový ◽  
Otakar Bokůvka ◽  
Michal Jambor ◽  
...  
Keyword(s):  
Fracture Surface ◽  
Aluminium Alloy ◽  
Fatigue Fracture ◽  
Shot Peening ◽  
Fatigue Fracture Surface ◽  
Surface Character
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