scholarly journals Effect of Shot Peening with Fine Zirconia Shot on Fatigue Property of Friction Stir Welded A6061 Alloy

2014 ◽  
Vol 63 (8) ◽  
pp. 596-601 ◽  
Author(s):  
Kiyotaka MASAKI ◽  
Kenji YAMASHIRO ◽  
Yuji KOBAYASHI ◽  
Toshiya TUJI
Keyword(s):  
Shot Peening ◽  
Fatigue Property ◽  
Friction Stir ◽  
A6061 Alloy

Limitation of Distortion in Friction Stir Welded (FSW) Panels Using Needle Peening

2010 ◽  
Vol 638-642 ◽  
pp. 1203-1208 ◽  
Author(s):  
Simon Larose ◽  
Laurent Dubourg ◽  
C. Perron ◽  
Mohammad Jahazi ◽  
Priti Wanjara
Keyword(s):  
Residual Stresses ◽  
Shot Peening ◽  
Sheet Material ◽  
Travel Speed ◽  
Needle Size ◽  
Friction Stir ◽  
Average Value ◽  
Aa 2024 ◽  
Induced Stresses ◽  
Needle Diameter

Friction stir welding (FSWing) induces residual stresses and distortions in welded structures. Such residual stresses reduce the fatigue life of welded components, while the induced distortions prevent the welding of large or thin components. In the present study, needle peening was used to induce additional residual stresses in 2.3-mm thick (FSWed) aluminum alloy (AA) 2024-T3 sheets. This was done with the objective to counterbalance the welding-induced stresses and thus reduce the overall stresses and distortions. The needle peening process, which stems from shot peening, consists of hammering a surface using cylindrical spherical ended shots sliding back and forth in a treatment head. An instrumented needle peening machine was used to carry out peening on as-received (or bare) and bead-on-plate FSWed AA2024-T3 material. In both cases, the width of the peening area corresponded to that of a typical weld. The influence of the peening process parameters such as needle size, applied power and travel speed on the surface quality and magnitude of the induced distortions were evaluated. The results indicate that, by increasing the needle diameter from 1.2 mm to 2.0 mm, the peening-induced deflection on bare sheet material increased by an average value of 27% while the roughness average, Ra, decreased by an average value of 47%. It was also found that a surface finish qualitatively similar to that of conventional shot peening could be obtained by using appropriate needle peening trajectories. Finally, needle peening with an applied power of 10% was sufficient for eliminating 37% of the welding-induced transverse curvature and 82% of the welding-induced longitudinal curvature.

scholarly journals Influence of Pre-Stress Magnitude on Fatigue Crack Growth Behavior of Al-Alloy

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1267
Author(s):  
Chunguo Zhang ◽  
Weizhen Song ◽  
Qitao Wang ◽  
Wen Liu
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Shot Peening ◽  
Fatigue Property ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Al Alloy ◽  
Fatigue Crack Growth Behavior

From tensile overload to shot peening, there have been many attempts to extend the fatigue properties of metals. A key challenge with the cold work processes is that it is hard to avoid generation of harmful effects (e.g., the increase of surface roughness caused by shot peening). Pre-stress has a positive effect on improving the fatigue property of metals, and it is expected to strength Al-alloy without introducing adverse factors. Four pre-stresses ranged from 120 to 183 MPa were incorporated in four cracked extended-compact tension specimens by application of different load based on the measured stress–strain curve. Fatigue crack growth behavior and fractured characteristic of the pre-stressed specimens were investigated systematically and were compared with those of an as-received specimen. The results show that the pre-stress ranged from 120 to 183 MPa significantly improved the fatigue resistance of Al-alloy by comparison with that of the as-received specimen. With increasing pre-stress, the fatigue life first increases, then decrease, and the specimen with pre-stress of 158 MPa has the longest fatigue life. For the manner of pre-stress, no adverse factor was observed for increasing fatigue property, and the induced pre-stress reduced gradually till to disappear during subsequent fatigue cycling.

Effects of Laser Shock Peening and Ultrasonic Shot Peening on Fatigue Property of 1Cr11Ni2W2MoV Stainless Steel

2013 ◽  
Vol 50 (5) ◽  
pp. 051403 ◽  
Author(s):  
赖志林 Lai Zhilin ◽  
汪诚 Wang Cheng ◽  
李应红 Li Yinghong ◽  
周留成 Zhou Liucheng ◽  
何卫锋 He Weifeng ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Shot Peening ◽  
Fatigue Property ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Ultrasonic Shot Peening ◽  
Shock Peening

The effect of controlled shot peening on the fatigue behaviour of 2024-T3 aluminium friction stir welds

2007 ◽  
Vol 29 (8) ◽  
pp. 1531-1545 ◽  
Author(s):  
A ALI ◽  
X AN ◽  
C RODOPOULOS ◽  
M BROWN ◽  
P OHARA ◽  
...  
Keyword(s):  
Shot Peening ◽  
Fatigue Behaviour ◽  
Friction Stir

OS1306 Improvement of Fatigue Property of A5056 Aluminum Alloy by Shot-peening using Fine Particles of 10μm in Diameter

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS1306-1_-_OS1306-3_
Author(s):  
Yuki NAKAMURA ◽  
Shoichi KIKUCHI ◽  
Koichiro NAMBU ◽  
Masafumi ANDO
Keyword(s):  
Aluminum Alloy ◽  
Shot Peening ◽  
Fine Particles ◽  
Fatigue Property

312 High Cycle Fatigue Property of Shot peening Treated ADI in Long Life Fatigue

2001 ◽  
Vol 2001 (0) ◽  
pp. 251-252
Author(s):  
Takusaburo Hosoya ◽  
Takeshi Sekino ◽  
Kiyotaka Masaki ◽  
Takashi Matsumura ◽  
Yasuo Ochi
Keyword(s):  
Shot Peening ◽  
High Cycle Fatigue ◽  
Fatigue Property ◽  
Cycle Fatigue ◽  
Long Life

Enhancement of Fatigue Strength of SAE 1045 Steel by Tempering Treatment and Shot Peening

2007 ◽  
Vol 561-565 ◽  
pp. 41-44 ◽  
Author(s):  
Sasan Yazdania ◽  
Nariman Yoozbashi ◽  
Alireza Ebrahimi
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Fatigue Behavior ◽  
Fatigue Property ◽  
Tempering Temperature ◽  
Tempering Treatment ◽  
Electron Microscopes ◽  
Initiation Stage ◽  
Scanning Electron Microscopes ◽  
1045 Steel

Effects of tempering temperature and shot peening on fatigue behavior of SAE 1045 steel are reported. Tensile and fatigue property measurements are reported for samples tempered and shot peened at 300 and 550°C. Microstructural studies and fracture surface observations were carried out by optical and scanning electron microscopes. The experimental results showed that, fatigue strength increases with decrease of tempering temperature and shot peening treatment. SEM analyses indicated that all three stages of fatigue fracture affected by tempering treatment whilst shot peening treatment only have an effect on the crack initiation stage.

Effect of Steel shot peening Time on some Mechanical Properties of Friction stir Welds for Aluminum Alloy (2024 – T3)

2020 ◽  
Vol 27 (4) ◽  
pp. 58-69
Author(s):  
Ghazwan Shihab ◽  
Adel Al-Bash
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Shot Peening ◽  
Mechanical Tests ◽  
Friction Stir ◽  
Compressive Stresses ◽  
Surface Annealing ◽  
Aluminum Alloy 2024 ◽  
Steel Balls

The aim of this work is to study the effect of the time of shot peening 3mm diameter steel balls on the mechanical properties of (2024 - T3) aluminum alloy butt welds. The welds were joined using Friction stir welding method. Mechanical tests) Tensile strength, hardness, fatigue strength( were performed on welded joints to determine the variation of these properties. The experimental results of SP time, 5 and 10 minutes give an improvement in mechanical properties. It was found that the longer the time of shot peening the mechanical properties are increased to a certain extent than the effect begins whereas when shot peening time at 15 min the mechanical properties decrease due to the concentration of stresses and surface annealing. Results show that the best mechanical properties of the welded zone were obtained at 10 minutes shot time due to the high compressive stresses generated by shot peening.

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