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ultrasonic nondestructive testing of Superplastic Solid-State Welding Joint for Different Steels

Journal of Iron and Steel Research International 2002年第2期9卷 58-61页

作者： ZHANG Ke-ke YANG Yun-lin CHEN Huai-dong XUE Jin Henan University of Science and Technology Xi'an Jiaotong University Huazhong University of Science and Technology

Based on quantitative microscopic examinations of welds and welding rate for different steels(40Cr and T10A) joint,which possess the ultra-fine microstructure after high frequency hardening(HFH) and salt-bath cyclic quenching(SCQ),the suitable defect grey scale threshold value was determined,and the welding rate of superplastic solid-state welding of different steels(40Cr and T10 A steel) was systematically inspected and analyzed by means of self-made ultrasonic imaging inspection *** experimental results showed that the superplastic solid-state weld of different steels can be inspected more accurately,reliably and quickly by this system,and the results were in good accordance with that of metallographic *** welding rate of superplastic welding is in linear relation with tensile strength of joint.

关键词： superplastic solid-state welding welding rate ultrasonic nondestructive testing

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Definition and Verification of Shape Meter Method

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Journal of Iron and Steel Research International 2002年第2期9卷 53-57页

作者： ZHANG Jin-zhi DUAN Chun-hua ZHU Jian-qin Central Iron&Steel Research Institute Shanghai Baosteel Group Co

Based on quantitative microscopic examinations of welds and welding rate for different steels (40Cr and T10A) joint, which possess the ultra fine microstructure after high frequency hardening (HFH) and salt bath cyclic quenching (SCQ), the suitable defect grey scale threshold value was determined, and the welding rate of superplastic solid state welding of different steels (40Cr and T10A steel) was systematically inspected and analyzed by means of self made ultrasonic imaging inspection system. The experimental results showed that the superplastic solid state weld of different steels can be inspected more accurately, reliably and quickly by this system, and the results were in good accordance with that of metallographic observation. The welding rate of superplastic welding is in linear relation with tensile strength of joint.

关键词： superplastic solid state welding welding rate ultrasonic nondestructive testing

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Focusing behaviors of ultrasonic phased arrays in anisotropic and inhomogeneous weldments

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China Welding 2012年第3期21卷 33-37页

作者：赵新玉卢宗兴王少泽刚铁徐春广 Key Laboratory of Fundamental Science for Advanced Machining Beijing Institute of TechnologyBeijing100081 State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001

It meets some difficulties in the case of ultrasonic phased arrays testing for the nickel-based alloy welded joint, since the ultrasound will propagate with curvilinear paths in this kind anisotropic joint. Thus, it is hard to calculate the phased array time delays properly according to the traditional focusing approach, which is based on the assumption that the sound beam will propagate in straight lines. In order to focus the phased arrays beam in this kind anisotropic joint, we provide a modified focusing approach by combining the ray tracing method and the bisectional searching optimization. With the help of this focusing approach, the curved ray path connecting each element position in phased arrays to the expected focus point in weldments can be determined, so that it can be used to calculate the proper time delay and control the beam focusing in the anisotropic weldment. Furthermore, some experimental examinations are carried out to compare the focusing behaviors between the traditional and the modified focusing approach. It shows that the provided focusing approach is more accurate than the traditional method in the case of inspection on the nickel-based alloy weldments.

关键词： ultrasonic nondestructive testing nickel-based alloy weldments phased arrays ray tracing

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Locating flaws in anisotropic and inhomogeneous weldments using ray tracing method

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China Welding 2011年第1期20卷 17-21页

作者：赵新玉刚铁肖定国王浚人 Key Laboratory of Fundamental Science for Advanced Machining School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001

ultrasonic inspections on nickel-based alloy weldments meets some difficulties due to the curvilinear propagating paths will appear in both anisotropic and inhomogeneons welded joints. Thus, it is difficult to determine the exact location of flaws using the traditional ultrasonic testing method which is based on the assumption that the sound beam will propagate in straight lines. In order to overcome this problem, we provide a new model-based inspection approach to locate the flaws in the nickel-based alloy weldments. Furthermore, some experimental examinations are carried out to compare the locating accuracy between the traditional and the modeled-based approach. It shows that the provided model-based inspection method is more accurate than the traditional method in inspection of the nickel-based alloy weldments.

关键词： ultrasonic nondestructive testing nickel-based alloy weldments ray tracing

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Simulation and experiments of ultrasonic propagation in nickel-based alloy weldments

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China Welding 2008年第4期17卷 17-21页

作者：赵新玉刚铁赵雪梅 State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology

In order to obtain good understanding of complicated beam propagation behaviors in nickel-based alloy weldments , ray tracing simulation is established to predict the ultrasonic beam path in a special welded structure of dissimilar steels. Also experimental examinations are carried out to measure the ultrasonic beam paths in the weldment. Then comparisons of the modeling predictions with experimental results are presented to reveal the complicated beam propagation behaviors.

关键词： ray tracing nickel-based alloy weldments ultrasonic nondestructive testing

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