A Method for Measuring the Content of Interstitial Carbon Atoms Using the Snoek Relaxation Internal Friction Peak in the α-Fe System of Materials
A technology for measuring gaps and carbon atoms, which is applied in measuring devices, analytical materials, instruments, etc., can solve the problems of inaccuracy and achieve the effect of efficient detection methods, accurate data, and accurate measurement
Active Publication Date: 2021-11-05
SHANGHAI UNIV
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This has led to a certain inaccuracy in the solution to the k value in the past
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[0036] Below in conjunction with specific implementation example, above-mentioned scheme is described further, and preferred embodiment of the present invention is described in detail as follows:
[0037] In this embodiment, the material used in this embodiment is ultra-low carbon steel with a body-centered cubic structure. In order to accurately measure the relationship between the content of its interstitial carbon atoms and the Snoek relaxation internal friction peak, two experiments were obtained by processing group, see figure 1 and figure 2 In this embodiment, a method for measuring the content of interstitial carbon atoms using the Snoek relaxation internal friction peak in the material α-Fe system includes the following steps:
[0038] a. Set up a group of experimental groups as experimental group 1. Through the processing technology, the grains inside the α-Fe system of the material are made large enough to make the grain size of the material reach more than 522 μm,...
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The invention discloses a method for measuring the content of interstitial carbon atoms by using the Snoek relaxation internal friction peak in the material α-Fe system, by introducing two segregation coefficients k 1 and k 2 To characterize interstitial carbon atoms segregated to dislocations and grain boundaries, and then subtract the content of carbon atoms segregated to defects from the total carbon atoms, and finally a more accurate k value can be obtained. The method of the present invention considers dislocations and grain boundaries for interstitial atoms, introduces the segregation coefficient of dislocations and interstitial atoms at the grain boundaries, and further accurately obtains the numerical relationship between the content of interstitial atoms and the Snoek relaxation internal friction peak intensity, thereby more accurately Accurately use the internal friction test to measure the content of interstitial carbon atoms. The present invention removes the content of carbon atoms segregated at defects from the carbon atoms in the α-Fe system, the data used is more accurate, the obtained results are more accurate and reliable, and the internal friction test can be used more accurately for gaps The carbon content is measured.
Description
technical field [0001] The invention relates to a method for measuring the content of interstitial carbon atoms inside a material. The method for measuring the content of interstitial carbon atoms using an internal friction analysis test method is applied to the technical fields of material internal friction detection and material microstructure energy detection and characterization. Background technique [0002] Internal friction is a common phenomenon in nature. It means that even if a vibrating object is completely isolated from the outside world, its mechanical vibration will gradually attenuate. This phenomenon that mechanical vibration energy is irreversibly dissipated into heat energy is called internal friction. The internal friction of metal materials is the internal point defects including solute atoms, line defects, surface defects including grain boundaries, domain boundaries, phase boundaries and other defects, bulk defects including second phase particles and th...
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IPC IPC(8): G01N33/2022
CPCG01N33/2022
Inventor 王逢源汪宏斌陈卓秦子威
Owner SHANGHAI UNIV