Structural Analysis of Anatase Polycrystalline Films Using Time-Dependent Deformation Behavior

2003 ◽  
Vol 42 (Part 1, No. 4A) ◽  
pp. 1738-1743 ◽  
Author(s):  
Hironori Sugata ◽  
Shigeo Ohshio ◽  
Hidetoshi Saitoh
2001 ◽  
Vol 695 ◽  
Author(s):  
Hironori Sugata ◽  
Shigeo Ohshio ◽  
Hidetoshi Saitoh

ABSTRACTWe introduce an analytical technique for time-dependent deformation behavior of the polycrystalline films using a nano-indenter. This technique permits evaluation of structural deformation of the nanometer scale of the thin films. In this paper, good accuracy conditions were determined to measure deformation behavior of the polycrystalline films. The polycrystalline films of anatase were used to investigate the grain boundary structure. We prove that the analysis of time-dependent deformation behavior is effective to investigate the structure of the polycrystalline films.


1998 ◽  
Vol 37 (Part 1, No. 11) ◽  
pp. 6102-6106 ◽  
Author(s):  
Daisuke Tanaka ◽  
Shigeo Ohshio ◽  
Hidetoshi Saitoh

2021 ◽  
Vol 8 ◽  
Author(s):  
Gabriel Dämmer ◽  
Michael Lackner ◽  
Sonja Laicher ◽  
Rüdiger Neumann ◽  
Zoltán Major

Polymer ◽  
2003 ◽  
Vol 44 (16) ◽  
pp. 4589-4597 ◽  
Author(s):  
H.H Le ◽  
Th Lüpke ◽  
T Pham ◽  
H.-J Radusch

Author(s):  
P. F. Tortorelli ◽  
H. Wang ◽  
K. A. Unocic ◽  
M. L. Santella ◽  
J. P. Shingledecker ◽  
...  

Creep testing and microstructural analysis were used to assess the properties and time-dependent deformation behavior of precipitation-strengthened nickel-based alloys, specifically, Inconel® alloy 740 and Haynes® 282® alloy, for use as pressure components in boilers operating under advanced steam conditions (750°C, >35 MPa). In support of the need for extended service of steam boiler tubing, piping and vessels, the ability of simple Larson-Miller estimates and a modified power-law model (Wilshire et al.) to predict creep lifetimes on the order of 105 hours based on experimental data out to almost 50,000 h was evaluated for these alloys. Even under conservative conditions, both Inconel alloy 740 and Haynes 282 project to have creep lifetimes exceeding 100,000 hours at 750°C and 100 MPa. Paper published with permission.


1971 ◽  
Vol 93 (3) ◽  
pp. 875-882 ◽  
Author(s):  
M. R. Snoey ◽  
M. G. Katona

This study was initiated to: (1) perform an analytical structural analysis on an acrylic pressure hull, (2) compare the analytical results with all available experimental results, and (3) present an operating-depth curve. The design analyzed was a pressure hull incorporating twelve spherical pentagons of acrylic plastic bonded together to form a sphere with an outside diameter of 66 in. and a wall thickness of 2.5 in. Conical steel penetrations were located at the two poles. The experimental results were obtained from strain-gage data from two independent pressure tests to 500 psi on two acrylic hulls of the same design. The analysis on the structure was performed with a finite-element computer code with particular emphasis on the acrylic-steel boundary. The boundary conditions at the acrylic-steel interface were two extreme cases: perfectly fixed and perfectly free. A time-dependent yield-failure criterion for acrylic plastic was combined with the structural analysis to provide an operating-depth curve as a function of both time and temperature. Comparison of analytical and experimental results indicated excellent agreement. At a temperature of 70 deg F and a maximum of 50 hr load duration, the acrylic hull can operate to 1000 ft with a safety factor of 1.5 based on yield and a safety factor of 2.6 based on collapse.


2014 ◽  
Vol 29 (4) ◽  
pp. 489-494 ◽  
Author(s):  
J. H. Choi ◽  
B. G. Pyo ◽  
J. S. Tae ◽  
H. P. Park ◽  
B. O. Rhee

2002 ◽  
Vol 394-395 ◽  
pp. 333-336
Author(s):  
Guang Bin Rao ◽  
Jian Qiu Wang ◽  
Wei Ke ◽  
En Hou Han

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