Erosion mechanisms and sediment sources in a peatland forest after ditch cleaning

2016 ◽  
Vol 41 (13) ◽  
pp. 1841-1853 ◽  
Author(s):  
Tapio Tuukkanen ◽  
Leena Stenberg ◽  
Hannu Marttila ◽  
Leena Finér ◽  
Sirpa Piirainen ◽  
...  
Keyword(s):  
Sediment Sources ◽  
Erosion Mechanisms ◽  
Ditch Cleaning

Research on Material Erosion Mechanisms of High Si-Al Alloy by Micro-EDM

2013 ◽  
Vol 652-654 ◽  
pp. 1157-1162
Author(s):  
Fu Qiang Hu ◽  
Jian Fei Sun ◽  
Jun Qi Wei ◽  
Yong Zhang ◽  
Yan Dong Jia ◽  
...  
Keyword(s):  
Electrical Discharge Machining ◽  
Spray Forming ◽  
Copper Electrode ◽  
Al Alloy ◽  
Micro Edm ◽  
Tungsten Electrode ◽  
Micro Electrical Discharge Machining ◽  
Material Erosion ◽  
Erosion Mechanisms ◽  
Set Up

This paper researches the material erosion mechanisms of high silicon- aluminum (Si-Al) alloy in micro electrical discharge machining (Micro-EDM). By using Quanta 200F environment scanning electron microscope, the microstructure of Al-50wt%Si alloy by spray forming was observed. And a simplified model of high Si-Al alloy was set up. The Al-50wt%Si alloy was machined by using copper electrode and tungsten electrode respectively. And the differences of surface morphologies and element energy spectrum were compared. The process and the material erosion mechanisms of high Si-Al alloy in Micro-EDM were analyzed in detail. The results may provide theoretical basis for Micro-EDM of high Si-Al alloy.

Mechanisms of Metal Removal by Impacting Dust Particles

1970 ◽  
Vol 92 (3) ◽  
pp. 639-652 ◽  
Author(s):  
C. E. Smeltzer ◽  
M. E. Gulden ◽  
W. A. Compton
Keyword(s):  
Materials Science ◽  
Alloy Composition ◽  
Metal Removal ◽  
Physical Models ◽  
Dust Particles ◽  
True Temperature ◽  
Solid Particle Erosion ◽  
Experimental Phase ◽  
Erosion Processes ◽  
Erosion Mechanisms

This is a two-part paper, which stresses the materials science approach to understanding dust erosion mechanisms. The first part is an experimental phase, studying the effects upon solid-particle erosion, of such material and environmental variables as target alloy composition and heat-treat condition; dust particle velocity, size, concentration, velocity, and kinetic energy; carrier-gas true temperature and impingement angle. All test variables and their limits were chosen to simulate the range of engineering conditions and erosive environments encountered in helicopter turbine service. Actual erosion data are compared with erosion levels predicted by existing theories on particulate erosion. The second part is a diagnostic phase, programmed to detect and study visible phenomena associated with the erosion processes, using high-magnification electron microscopy. Phenomenological evidence obtained from the erosion surfaces and erosion products are used to define probable physical models of the erosion mechanisms.

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