Optimal cutter size determination for 2½-axis finish machining of NURBS profile parts

2009 ◽  
Vol 47 (22) ◽  
pp. 6279-6293 ◽  
Author(s):  
Zezhong C. Chen ◽  
Hongda Zhang
Keyword(s):  
Size Determination ◽  
Finish Machining

A Cross-Method Comparison of Sub-10 nm Nanoparticle Size Distribution

2019 ◽  
Author(s):  
Ye Yang ◽  
Suiyang Liao ◽  
Zhi Luo ◽  
Runzhang Qi ◽  
Niamh Mac Fhionnlaoich ◽  
...  
Keyword(s):  
Size Distribution ◽  
Analytical Ultracentrifugation ◽  
Statistical Significance ◽  
Method Comparison ◽  
Size Determination ◽  
Size Dependent ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Gold Nps ◽  
Reliable Representation

Accurate nanoparticle (NP) size determination is essential across research domains, with many functions in nanoscience and biomedical research being size-dependent. Although transmission electron microscopy (TEM) is capable of resolving a single NP down to the sub-nm scale, the reliable representation of entire populations is plagued by challenges in providing statistical significance, predominantly due to limited sample counts, suboptimal preparation procedures and operator bias during image acquisition and analysis. Meanwhile alternative techniques exist, but reliable implementation requires a detailed understanding of appendant limitations. Herein, conventional TEM is compared to the size determination of sub-10 nm gold NPs in solution by small-angle X-ray scattering and analytical ultracentrifugation. Form-free Monte Carlo fitting of scattering profiles offers access to a direct representation of the core size distribution while ultracentrifugation sedimentation velocity analysis provides information of the hydrodynamic size distribution. We report a comparison of these three methods in determining the size of quasi-monodisperse, polydisperse and bimodal gold nanoparticles of 2 – 7 nm and discuss advantages and limitations of each technique.

CARPENTER STAINLESS TYPE 405

Alloy Digest ◽  
1981 ◽  
Vol 30 (11) ◽  
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Annealed Condition ◽  
Finish Machining ◽  
Chromium Stainless Steel

Abstract CARPENTER STAINLESS TYPE 405 is a 12% chromium stainless steel that does not harden appreciably. It was designed to allow its use in the as-welded condition. It is particularly desirable for welded applications which require finish machining. It has moderate tensile strength (70,000 psi) in the fully annealed condition and resists corrosion in mild environments. It is used for parts and structures that cannot be annealed after welding. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-395. Producer or source: Carpenter.

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