Ferromagnetic materials have the interaction between mechanical and magnetic fields which is called magnetoelastic coupling. Also it is known that magnetic properties of ferromagnetic materials depend on plastic deformation. There are various kinds of Non-Destructive Testing (NDT) based on these phenomena for estimation of stress and plastic deformation. We propose a new analytical method of magnetic hysteresis curve, in which the saturation magnetic hyste resis curve is decomposed to neutral magnetization...
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Estimation of Stress and Plastic Deformation of SS400 SteelUsing Magnetic Properties

In Japan, the 1st Performance Demonstration (PD) qualification examination started in March of 2006 and was operated by the Performance Demonstration (PD) center of Central Research Institute of Electric Power Industry (CRIEPI). The first application of Japanese PD system is crack depth sizing on stainless steel piping welds. PD center is planning to start weld overlay (WOL) PD examination as a second step, and dissimilar weld (DMW) PD examination as third step. In particular, WOL PD examination includ...
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The examination system for Japanese WOL and DMW PD qualification test 東海林 一 Hajime SHOHJI

In Japan, a performance demonstration (PD) system for certifying WOL inspection methods is being developed. The Japanese qualification requirements dictate that either real IGSCC or equivalent flaws that produce ultrasonic responses similar to IGSCC be used in the qualification test samples. Studies have shown that it is very difficult to control the growth of deep IGSCC in weld overlay samples, so the Japanese have selected an alternative flaw making process that is capable of produc ing equivalent respo...
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The Ultrasonic Responses from Intergranular Stress Corrosion Cracking andother alternative flaws in Weld Overlay (WOL) Samples

吉田 光宏 Mitsuhiro YOSHIDA 山本 昌志 Masashi YAMAMOTO 中村 直樹 Naoki NAKAMURA ...
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Portable 950keV X-band Linac X-ray Source for On-site NDT

Our portable X-band (9.3GHz) 950KeV linac has been successfully upgraded. The problems of RF power oscillation , beam current oscillation and reduction and finally lack of X-ray intensity were solved by replacing the axia l coupling cavities with the side-coupled ones. Designed X-ray dose rate of 0.05 Sv/min@lm is going to be achi eved. Length of the accelerating tube is reduced to less than 25 cm. X-ray source part with the local radiation shielding is connected by the flexible waveguide with the box of t...
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Study on Portable X-band 950keV linac X-ray Sourcefor On-site Nondestructive Inspection

Magnetic properties of heavy ion irradiated single crystalline Fe Cr films were investigated High quality Fe 20%Cr 001 films with a thickness of 30 nm were prepared by electron beam deposition and irradiated by 2 4MeV Cu2+ ions at various temperatures and magnetization curves were measured using a VSM Micro fabricated films and Fe Cr film with Cr concentration gradient 0% 13% were also prepared and magnetic domain struct ures were observed using a Kerr microscope The coercivity of Fe 20%Cr increased by ...
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The irradiation temperature and Chromium concentration dependence of the magnetic properties of heavy-ion irradiated Iron-Chromium alloys