Use of neutron and synchrotron X-ray diffraction for evaluation of residual stresses in a 2024-T351 aluminum alloy variable-polarity plasma-arc weld

2006 ◽  
Vol 37 (2) ◽  
pp. 411-420 ◽  
Author(s):  
S. Ganguly ◽  
M. E. Fitzpatrick ◽  
L. Edwards
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
Plasma Arc ◽  
X Ray Diffraction ◽  
X Ray ◽  
Variable Polarity ◽  
Variable Polarity Plasma Arc

scholarly journals Evolution of Microstructure and Mechanical Properties in a Single-Stage Aged 7075 Aluminum Alloy Pulse Variable Polarity Plasma Arc Welded Joint

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 428
Author(s):  
Guowei Li ◽  
Yahong Liang ◽  
Furong Chen ◽  
Yongquan Han ◽  
Li Sun
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Aging Temperature ◽  
Welded Joint ◽  
Single Stage ◽  
Precipitate Size ◽  
7075 Aluminum Alloy ◽  
Plasma Arc ◽  
Variable Polarity ◽  
Variable Polarity Plasma Arc

A 7075 aluminum alloy was successfully welded by pulsed variable polarity plasma arc welding (PVPPAW) and the single-stage aging behavior of the 7075 aluminum alloy PVPPAW joint was systematically investigated. The results demonstrated that the tensile strength of the welded joints initially increased and then decreased with the increase of the single-stage aging temperature and time. After single-stage aging at 490 °C for 80 min and at 130 °C for 24 h, the tensile strength of the welded joint was 551 MPa, which was increased by 38.5% compared to the as-welded joint. Moreover, the conductivity was 25% international annealed copper standard (IACS) at room temperature, and the resistance to stress corrosion was improved. The main strengthening phases of the weld center were η′ and η phase. The average precipitate size slightly increased with the increase of the single-stage aging temperature, but no obvious change was observed with the increase of the single-stage aging time. The area fraction was initially increased and then decreased with the increase of the single-stage aging temperature and time.

Residual stresses in aluminum alloy AA7475-T761 using X-Ray diffraction technique

2017 ◽  
Author(s):  
Sergio Delijaicov ◽  
Hugo Resende ◽  
Mario Henrique Batalha ◽  
João Paulo Buoro Perandini
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
X Ray Diffraction ◽  
X Ray

Physical mechanism of material flow in variable polarity plasma arc keyhole welding revealed by in situ x-ray imaging

2021 ◽  
Vol 33 (1) ◽  
pp. 017121
Author(s):  
Bin Xu ◽  
Shujun Chen ◽  
Shinichi Tashiro ◽  
Fan Jiang ◽  
Manabu Tanaka
Keyword(s):  
Material Flow ◽  
Physical Mechanism ◽  
Plasma Arc ◽  
X Ray ◽  
Keyhole Welding ◽  
X Ray Imaging ◽  
Variable Polarity ◽  
Variable Polarity Plasma Arc

Effect of Nozzle-Traveling Velocity on Oil Cavitation Jet Peening of Aluminum Alloy, AA 6063-T6

2007 ◽  
Vol 129 (4) ◽  
pp. 609-613 ◽  
Author(s):  
A. Sahaya Grinspan ◽  
R. Gnanamoorthy
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
Cavitation Number ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compressive Stresses ◽  
Modification Process ◽  
Oil Jet ◽  
The Impact ◽  
Compressive Residual Stresses

A new surface modification process was developed to introduce compressive residual stresses at the surface of components. In this process, instead of oil droplets a high-velocity cavitation jet (cloud of oil bubbles) impinges on the surface of the component to be peened. The impact pressure generated during implosion of cavitation bubbles causes severe plastic deformation at the surface. Consequently, beneficial compressive stresses are developed at the surface. In order to find the potential of this process, aluminum alloy AA6063-T6 specimens were peened at a constant cavitation number with various nozzle-traveling velocities. Residual stress induced by oil jet cavitation peening was measured using X-ray diffraction. Oil cavitation jet peening results in a smooth and hard surface. The developed compressive residual stresses at the peened surface are about 52%, 42%, and 35% of yield strength in samples for peened at nozzle traveling velocities of 0.05mm∕s, 0.10mm∕s, and 0.15mm∕s, respectively.

Residual Stresses in Locally Long Fiber Reinforced Aluminum Parts

2011 ◽  
Vol 284-286 ◽  
pp. 284-292 ◽  
Author(s):  
Shao Chun Sun ◽  
Zhi Yuan Chen ◽  
Qiang Wu ◽  
De Xin Ma ◽  
Yu Tao Zhao
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Tensile Residual Stress ◽  
Fiber Reinforced ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fem Method ◽  
The Matrix ◽  
Compressive Residual Stresses

In locally long fiber reinforced aluminum parts two types residual stresses exist. They are the microscopic residual stress between fiber and matrix and the macroscopic residual stress between reinforced and unreinforced zones. The residual stresses between fiber and matrix in γ-Al2O3 long fiber reinforced aluminum alloy Al-6-1-1 were measured with X-ray Diffraction process as well as simulated with FEM method. The results indicated that the residual stresses in both fiber and matrix were distributed very unequally. The maximum tensile residual stress occurred at the boundary in the matrix and the maximum compressive residual stresses occurred near the boundary in the fiber. The macroscopic residual stresses between the reinforced and unreinforced zones were also measured with borehole method as well as simulated with FEM. It was found that the macroscopic residual stresses at most locations in both the reinforced and unreinforced zones were not harmfully high. However in both reinforced and unreinforced zones there were small sub-zones of very large tensile residual stresses.

Material flow in variable polarity plasma arc keyhole welding of aluminum alloy

2018 ◽  
Vol 36 ◽  
pp. 480-486 ◽  
Author(s):  
Zhaoyang Yan ◽  
Shujun Chen ◽  
Fan Jiang ◽  
Ning Huang ◽  
Suolai Zhang
Keyword(s):  
Aluminum Alloy ◽  
Material Flow ◽  
Plasma Arc ◽  
Keyhole Welding ◽  
Variable Polarity ◽  
Variable Polarity Plasma Arc
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