Tungsten Alloy Shielding And Radiographic Testing Technology

Radiographic testing technology is a nondestructive testing method of inspecting materials for hidden flaws by using the ability of radiation (X-ray produced by an accelerator and γ-ray generated by the nuclear decay of radioactive isotopes) to penetrate various materials and the decay characteristic of radiation in materials. Radiographic testing technology can be used to detect the internal defects in metal and non-metallic materials and products, such as weld pores, cracks, porosity, segregation, slag, incomplete penetration and so on. Since the thickness and density of each portion of the detected object varies for the defects, and the radiation attenuation under different density and thickness of materials is different. So when a beam of uniform radiation irradiates the detected object, and if the partial region of the object exists flaws or there are some differences between the structures, the transmitted intensity of radiation would differ in different areas, which can be detected to determine the internal defects and the structural distribution of objects.

The common devices used for radiographic testing include X-ray detector and γ-ray detector. These two detectors use X-rays and γ-ray to detect flaws respectively. The γ ray has a strong penetrating power. When the body suffers from the γ ray exposure, γ-ray can enter into the human body, and interact with the human body cells, thus eroding the complex organic molecules (such as proteins, nucleic acids and enzymes), so that the body's normal chemical process is disturbed, severe may lead to cell death. While X ray can suppress, damage or even kill human cells, resulting in varying degrees of body changes in the physiology, pathology and biochemical aspects. And X-ray can also lead to hair loss, skin burns, sight disorders, leukemia and other issues. Therefore, people should pay attention to the radiation damage while using the radiographic testing technology, and pay attention to take protective measures.

Due to the high density, good corrosion resistance, high radiation absorption capacity and high strength of tungsten alloy, tungsten alloy shielding is the best choice to shield the radiation released from the use of radiographic testing technology. Compared to traditional radiation shielding materials (such as lead and boron carbide), tungsten alloy shielding provides excellent density with small capacity. With the same weight, high-density tungsten alloy shielding can provide the same energy absorption as lead using 1/3 less space. And tungsten alloy shielding is nontoxic, neither pollute the environment, but also will not endanger human health, it is extremely environmentally friendly shielding material.

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