Investigation to Hole Surface Microstructure Evolution in Drilling of Aerospace Alloys: Ti-5553

2021 ◽  
pp. 433-443
Author(s):  
David P. Yan
Keyword(s):  
Microstructure Evolution ◽  
Surface Microstructure ◽  
Aerospace Alloys

Surface Microstructure Evolution Upon Silicidation of Ni(Pt) and the Different Responses to Metal Etch

2013 ◽  
Author(s):  
Wentao Qin ◽  
Dorai Iyer ◽  
Jim Morgan ◽  
Carroll Casteel ◽  
Robert Watkins ◽  
...  
Keyword(s):  
Thin Film ◽  
Oxide Film ◽  
Microstructure Evolution ◽  
Depth Profiling ◽  
Surface Microstructure ◽  
The Difference ◽  
Surface Microstructures ◽  
Pt Films

Abstract Ni(5 at.%Pt ) films were silicided at a temperature below 400 °C and at 550 °C. The two silicidation temperatures had produced different responses to the subsequent metal etch. Catastrophic removal of the silicide was seen with the low silicidation temperature, while the desired etch selectivity was achieved with the high silicidation temperature. The surface microstructures developed were characterized with TEM and Auger depth profiling. The data correlate with both silicidation temperatures and ultimately the difference in the response to the metal etch. With the high silicidation temperature, there existed a thin Si-oxide film that was close to the surface and embedded with particles which contain metals. This thin film is expected to contribute significantly to the desired etch selectivity. The formation of this layer is interpreted thermodynamically.

Study on the surface microstructure evolution and wear property of bainitic rail steel under dry sliding wear

Wear ◽  
2020 ◽  
Vol 448-449 ◽  
pp. 203217 ◽  
Author(s):  
Yuda Chen ◽  
Ruiming Ren ◽  
Xiujuan Zhao ◽  
Chunhuan Chen ◽  
Rui Pan
Keyword(s):  
Microstructure Evolution ◽  
Sliding Wear ◽  
Rail Steel ◽  
Dry Sliding Wear ◽  
Surface Microstructure ◽  
Dry Sliding ◽  
Wear Property

Twinning Behavior in Magnesium Alloys Processed by Laser Shock Peening

2019 ◽  
Author(s):  
Bo Mao ◽  
Yiliang Liao ◽  
Bin Li
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloys ◽  
Microstructure Evolution ◽  
Laser Intensity ◽  
Deformation Twinning ◽  
Mg Alloys ◽  
Laser Shock Peening ◽  
Surface Microstructure ◽  
Laser Shock ◽  
Shock Peening

Abstract In this paper, the surface microstructure evolution of an AZ31B magnesium (Mg) alloy during laser shock peening (LSP) was investigated. Particular attention was paid to the deformation twinning behavior, which plays an important role in the mechanical properties of Mg alloys. The effect of laser intensity on the twinning distribution was investigated. Twin-twin interactions during LSP process were characterized. The mechanism responsible for the formation of gradient twinning microstructure and twinning-induced hardening effect were discussed.

Surface microstructure evolution of polytetrafluoroethylene microporous materials by a casting–lyophilization–calcining (CLC) method

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86387-86392
Author(s):  
F. Wang ◽  
H. L. Zhu ◽  
H. P. Zhang ◽  
H. Y. Tang ◽  
J. Y. Chen ◽  
...  
Keyword(s):  
Gas Separation ◽  
Microstructure Evolution ◽  
Microporous Materials ◽  
Surface Microstructure ◽  
Asymmetric Structure ◽  
The Novel

The novel casting–lyophilization–calcining (CLC) process endows PTFE microporous materials with a highly asymmetric structure and excellent filtration precision in solid–gas separation.

scholarly journals Bitumen surface microstructure evolution in subzero environments

2020 ◽  
Vol 279 (1) ◽  
pp. 3-15 ◽  
Author(s):  
F. TARPOUDI BAHERI ◽  
T.M. SCHUTZIUS ◽  
D. POULIKAKOS ◽  
L.D. POULIKAKOS
Keyword(s):  
Microstructure Evolution ◽  
Surface Microstructure
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