MOCVD Growth of High-Quality InN Films and Raman Characterization of Residual Stress Effects

2001 ◽  
Vol 228 (1) ◽  
pp. 1-4 ◽  
Author(s):  
E. Kurimoto ◽  
H. Harima ◽  
A. Hashimoto ◽  
A. Yamamoto
Keyword(s):  
Residual Stress ◽  
High Quality ◽  
Stress Effects ◽  
Mocvd Growth ◽  
Raman Characterization

A Detailed Evaluation of the Effects of Bulk Residual Stress on Fatigue in Aluminum

2014 ◽  
Vol 891-892 ◽  
pp. 1205-1211 ◽  
Author(s):  
Dale L. Ball ◽  
Mark A. James ◽  
Robert J. Bucci ◽  
John D. Watton ◽  
Adrian T. DeWald ◽  
...  
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Effective Utilization ◽  
Stress Effects ◽  
The Past ◽  
Property Data ◽  
Design Cycle ◽  
Detailed Evaluation ◽  
The Impact

The fully effective utilization of large aluminum forgings in aerospace structures has been hampered in the past by inadequate understanding of, and sometimes inaccurate representation of, bulk residual stresses and their impact on both design mechanical properties and structural performance. In recent years, significant advances in both computational and experimental methods have led to vastly improved characterization of residual stresses. As a result, new design approaches which require the extraction of residual stress effects from material property data and the formal inclusion of residual stresses in the design analysis, have been enabled. In particular, the impact of residual stresses on durability and damage tolerance can now be assessed, and more importantly, accounted for at the beginning of the design cycle.

Consistent Treatment of Weld Residual Stresses in Fracture Assessment

2002 ◽  
Author(s):  
P. Dong ◽  
J. K. Hong
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Crack Size ◽  
Stress Distributions ◽  
Stress Effects ◽  
Large Size ◽  
Fracture Assessment ◽  
Girth Welds ◽  
Consistent Treatment

Over the last decade, as more in-depth understanding of weld residual stresses is being achieved, particularly of their characteristic distributions in pressure vessel and piping components, the residual stress effects on stress intensities at welds are becoming better understood. In this paper, some of the important residual stress characteristics are first identified in the form of either “bending” dominated or “self-equilibrating” dominated types for girth welds. The applicability in other joint configurations in welded structures is then discussed, with a collection of validated residual stress distributions. The characterization of both “bending” and “self-equilibrating” types in residual stress distributions provides a consistent framework for stress intensity factor considerations in either fracture and fatigue assessment. The contribution of weld residual stresses to stress intensities at welds are shown to be in the form of K solutions under displacement controlled conditions. The “bending” type residual stresses provide a longer range of influence than “self-equilibrating” type in K solutions. The contribution of “self-equilibrating” type residual stresses to stress intensities is shown to be dominant when crack size is small, while the contribution of the “bending” type dominant for crack size up to a much large size with respect to wall thickness.

Weld Residual Stresses and Their Treatment in Fracture and Fatigue Assessment

2004 ◽  
Author(s):  
P. Dong
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Crack Size ◽  
Stress Distributions ◽  
Fatigue Assessment ◽  
Stress Effects ◽  
Large Size ◽  
Girth Welds ◽  
Range Of Influence

Over the last decade, as more in-depth understanding of weld residual stresses is being achieved, particularly of their characteristic distributions in pressure vessel and piping components, the residual stress effects on stress intensities at welds are becoming better understood. In this paper, some of the important residual stress characteristics are first identified in the form of either “bending” dominated or “self-equilibrating” dominated types for girth welds. The applicability in other joint configurations in welded structures is then discussed, with a collection of validated residual stress distributions. The characterization of both “bending” and “self-equilibrating” types in residual stress distributions provides a consistent framework for stress intensity factor considerations in either fracture and fatigue assessment. The contribution of weld residual stresses to stress intensities at welds are shown to be in the form of K solutions under displacement controlled conditions. The “bending” type residual stresses provide a longer range of influence than “self-equilibrating” type in K solutions. The contribution of “self-equilibrating” type residual stresses to stress intensities is shown to be dominant when crack size is small, while the contribution of the “bending” type dominant for crack size up to a much large size with respect to wall thickness.

Raman Characterization of InSb/GaAs Grown by Metalorganic Magnetron Sputtering

1989 ◽  
Vol 160 ◽  
Author(s):  
Z. C. Feng ◽  
S. Perkowitz ◽  
T. S. Rao ◽  
J. B. Webb
Keyword(s):  
Magnetron Sputtering ◽  
Lattice Mismatch ◽  
Longitudinal Optical ◽  
Biaxial Stress ◽  
High Quality ◽  
Gaas Substrates ◽  
Phonon Peak ◽  
Raman Characterization

AbstractThe new technique of metalorganic magnetron sputtering (MOMS) produces high-quality (100) epitaxial InSb films on (100) GaAs substrates, despite the large 14.6% lattice mismatch between InSb and GaAs. We have used Raman scattering to examine MOMS-grown InSb films of thicknesses 0.17 - 2.67 µm, and commercial bulk InSb. We observe the longitudinal optical (LO) phonon peak, and the second order 2LO peak, which is enhanced by outgoing resonance with the E1 + Δ1, gap of InSb. The half-widths and intensities of these bands are related to sample quality as a function of film thickness and to the role of biaxial stress in the InSb film.

MOCVD growth and characterization of high quality InP

1985 ◽  
Vol 73 (1) ◽  
pp. 83-95 ◽  
Author(s):  
L.D. Zhu ◽  
K.T. Chan ◽  
J.M. Ballantyne
Keyword(s):  
High Quality ◽  
Mocvd Growth

MOCVD Growth and Characterization of AlGaInN Nanowires and Nanostructures

2005 ◽  
Vol 892 ◽  
Author(s):  
Jung Han ◽  
K Kim ◽  
Jie Su ◽  
Maria Gherasimova ◽  
Arto Nurmikko ◽  
...  
Keyword(s):  
Mocvd Growth

scholarly journals Synthesis and Characterization of Fluorinated β-Ketoiminate Zinc Precursors and Their Utility in the AP-MOCVD Growth of ZnO:F

2015 ◽  
Vol 2015 (26) ◽  
pp. 4362-4372 ◽  
Author(s):  
Samuel D. Cosham ◽  
Gabriele Kociok-Köhn ◽  
Andrew L. Johnson ◽  
Jeff A. Hamilton ◽  
Michael S. Hill ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Mocvd Growth

scholarly journals Editorial for Special Issue “Historical Mineral Pigments”

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 237
Author(s):  
Carolina Cardell ◽  
Jose Santiago Pozo-Antonio
Keyword(s):  
Chemical Characterization ◽  
Glass Enamel ◽  
Special Issue ◽  
High Quality ◽  
Physical Chemical ◽  
Scientific Disciplines ◽  
Natural And Synthetic

The physical–chemical characterization of natural and synthetic historical inorganic and mineral pigments, which may be found embedded in paintings (real or mock-ups), glass, enamel, ceramics, beads, tesserae, etc., as well as their alteration under different decay scenarios, is a demanding line of investigation. This field of research is now both well established and dynamic, as revealed by the numerous publications in high-quality journals of varied scientific disciplines. [...]

Raman characterization of phonon confinement and strain effects from latent ion tracks in α‐quartz

2021 ◽  
Author(s):  
Maria C. Garcia Toro ◽  
Miguel L. Crespillo ◽  
Jose Olivares ◽  
Joseph T. Graham
Keyword(s):  
Phonon Confinement ◽  
Strain Effects ◽  
Ion Tracks ◽  
Raman Characterization
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