Comparison of corrosion behaviour of nanocrystalline 2024-T4 Al alloy processed by surface mechanical attrition treatment with two different mediums

2014 ◽  
Vol 50 (6) ◽  
pp. 425-432 ◽  
Author(s):  
L. Wen ◽  
Y. Wang ◽  
Y. Jin ◽  
X. Ren
Keyword(s):  
Corrosion Behaviour ◽  
Surface Mechanical Attrition Treatment ◽  
Al Alloy ◽  
Mechanical Attrition

Surface nanocrystallization of Mg-3 wt.% Li-6 wt.% Al alloy by surface mechanical attrition treatment

2016 ◽  
Vol 120 ◽  
pp. 124-128 ◽  
Author(s):  
Lehao Zhang ◽  
Yun Zou ◽  
Hongtao Wang ◽  
Liang Meng ◽  
Jiabin Liu ◽  
...  
Keyword(s):  
Surface Mechanical Attrition Treatment ◽  
Al Alloy ◽  
Surface Nanocrystallization ◽  
Mechanical Attrition

Ultrasonic Evaluation of Compressive Residual Stress of Surface Treated Metals

2005 ◽  
Vol 490-491 ◽  
pp. 184-189 ◽  
Author(s):  
Farid Belahcene ◽  
Xiaolai Zhou ◽  
Jian Lu
Keyword(s):  
Experimental Data ◽  
Residual Stresses ◽  
Nondestructive Evaluation ◽  
Subsurface Layer ◽  
Surface Mechanical Attrition Treatment ◽  
Shallow Subsurface ◽  
Ultrasonic Evaluation ◽  
Mechanical Attrition ◽  
Machine Parts ◽  
Compressive Residual Stresses

Shot peening is an effective method of improving fatigue performance of machine parts in the industry by producing a thin surface layer of compressive residual stresses that prevents crack initiation and retards crack growth during service. Nondestructive evaluation of the prevailing compressive residual stresses in the shallow subsurface layer is realized by the critically refracted longitudinal (Lcr) waves. This paper presents experimental data obtained on SMAT (surface mechanical attrition treatment) steel alloy S355 sample. Comparative travel-time shows that there are statistically significant differences in treated and untreated specimen. With knowledge of the acoustoelastic constants which are obtained by a test calibration, the experimental data indicates that compressive residual stresses are distributed near subsurface (hundreds of micron). These stress results show that the Lcr technique is efficient for evaluation of residual stresses after the surface treatment.

Comparison of Surface Nanostructured Electrodeposited Cu Produced from Different Power Types: Microstructure and Tensile Properties

2009 ◽  
Vol 614 ◽  
pp. 189-196
Author(s):  
H.L. Chan ◽  
Jian Lu
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Direct Current ◽  
Pulse Power ◽  
Double Pulse ◽  
Surface Mechanical Attrition Treatment ◽  
Electrodeposition Process ◽  
Mechanical Attrition ◽  
Off Time

Different Power types and parameters in the electrodeposition process result in different microstructures and hence mechanical properties. In this paper, direct current and double pulse power with different combinations of on and off time have been used for electrodeposition. The tensile properties of the electrodeposited (Ed) Cu with different parameters in process have been studied and also the microstructures of the Cu obtained have been examined by SEM. This paper aims at explaining the effects of one of the important parameters in electrodeposition: different power types on the tensile properties. The tensile properties of Ed Cu after Surface Mechanical Attrition Treatment (SMAT) are also shown in this paper.

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