نتایج جستجو برای: nondestructive method

تعداد نتایج: 1633342  

2004
W. Swiderski

Composite materials are often more practical in use for different military applications. These materials provide interesting results especially through their good strength properties, corrosion resistance and low specific weight. These materials have various structures. Any defect of these materials usually has a more complicated and other form than in metals and that is why methods and diagnos...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Tana Elizabeth Villafana William P Brown John K Delaney Michael Palmer Warren S Warren Martin C Fischer

The layering structure of a painting contains a wealth of information about the artist's choice of materials and working methods, but currently, no 3D noninvasive method exists to replace the taking of small paint samples in the study of the stratigraphy. Here, we adapt femtosecond pump-probe imaging, previously shown in tissue, to the case of the color palette in paintings, where chromophores ...

Journal: :Journal of biomedical optics 2016
Taehoon Kim Jeong-Im Kim Michelle A Visbal-Onufrak Clint Chapple Young L Kim

Nondestructive imaging of physiological changes in plants has been intensively used as an invaluable tool for visualizing heterogeneous responses to various types of abiotic and biotic stress. However, conventional approaches often have intrinsic limitations for quantitative analyses, requiring bulky and expensive optical instruments for capturing full spectral information. We report a spectrom...

Journal: :international journal of advanced design and manufacturing technology 0
m. s. safizadeh m. hasanian

oil and gas transmission pipelines are critical items of infrastructure in providing energy sources to regions and countries. steel pipes are commonly used which can be subject to both internal and external corrosion. this paper presents an advanced nondestructive inspection technique for detection of oil-gas pipeline corrosion defect. the pulsed eddy current (pec) method has been successfully ...

2012
Libo Gao Wencai Ren Huilong Xu Li Jin Zhenxing Wang Teng Ma Lai-Peng Ma Zhiyong Zhang Qiang Fu Lian-Mao Peng Xinhe Bao Hui-Ming Cheng

Large single-crystal graphene is highly desired and important for the applications of graphene in electronics, as grain boundaries between graphene grains markedly degrade its quality and properties. Here we report the growth of millimetre-sized hexagonal single-crystal graphene and graphene films joined from such grains on Pt by ambient-pressure chemical vapour deposition. We report a bubbling...

2016
Mathias Kersemans Arvid Martens Joris Degrieck Koen Van Den Abeele Steven Delrue Filip Zastavnik Hugo Sol Wim Van Paepegem Dimitrios G. Aggelis Nathalie Godin

In the early 1980’s, the ultrasonic polar scan (UPS) technique was developed to assess the fiber direction of composites in a nondestructive way. In spite of the recognition by several researchers as being a sophisticated and promising methodology for nondestructive testing (NDT) and materials science, little advance was made during the following 30 years. Recently however, the UPS technique ex...

Journal: :Materiales De Construccion 2022

Nondestructive testing techniques have attracted growing interest in the last few years due to their ability assess material properties without damaging specimens. The free-free resonance method is a nondestructive technique based on analysis of natural frequencies sample. This study presents and discusses applicability this technique, traditionally used soils, for mechanical characterization r...

Journal: :Physical review letters 2016
Mahdi Hosseini Kristin M Beck Yiheng Duan Wenlan Chen Vladan Vuletić

We report the continuous and partially nondestructive measurement of optical photons. For a weak light pulse traveling through a slow-light optical medium (signal), the associated atomic-excitation component is detected by another light beam (probe) with the aid of an optical cavity. We observe strong correlations of g_{sp}^{(2)}=4.4(5) between the transmitted signal and probe photons. The obse...

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