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The tube part of the transition process improvement tensile samples


The mean difference; range; including standard deviation of view than the more obvious double arch specimen sample small slope,[link widoczny dla zalogowanych], closer to the data sample plugs are more stable. And heart rate through the circle from the calculation, look at three kinds of comparative samples elliptical level. A curse formula c ÷ V i where one - from the mouth of the heart rate - long axle 6 - minor axis c - half the focal length from (Table 2) shows that the sample plug head centrifugal rate is 0. 10, from arch sample rate of 0.2 centrifugal centrifuge sample rate of the slope value of 0.41. e more close to 0, then the oval will close circle. Specimens can be seen from the double arch is relatively heart rate was significantly lower than the eccentricity of the slope test bar samples from the same heart rate double arch board standard deviation is so bad}. It can be seen double-arch shape of the sample closer to the plug head fracture specimen fracture shape. Most of the slope of the fracture specimens from the two oval-shaped measurements (combined with Table 1 the elongation) of view: the sample location of the fracture elongation in addition to an impact, but at the same time gripping part of the post by the flattening elliptical sample that influence the fracture, especially fracture of the sample slope samples than double arch fracture more obvious. The other fork, in the GB6397-86 \Through testing, production inspection work experience gained is: the thickness of flat pieces of metal pipe diameter should be ≥ ÷ suitable head for the flat pieces of metal will directly affect the thickness of the specimen gauge section and the gripping part of the transition with a high degree of Therefore, the smaller the more highly than pouch hung from belt will help to improve the transition area deformation; help improve test dread the fracture location, fracture shape} to obtain experimental data favor the stability, reliability trends. Of course, no matter what part of the whole shape of the transition structure of the sample tube bit extension, tensile testing machine itself, the accuracy, compliance with standard sample, sample loading specimens in the vertical extent of conditions, skills,[link widoczny dla zalogowanych], and test all the test results,[link widoczny dla zalogowanych], etc. affected. 2 Conclusion (1) the transitional position dual arch-shaped tensile specimen the whole pipe, picking up experience in the production did not increase in the workload, the rain could improve the fracture location of the sample to improve the form of a fracture specimen fishing. (2J transitional position dual arch-shaped tensile specimen the whole tube, the yield strength, tensile strength, elongation in particular,[link widoczny dla zalogowanych], tend to be relatively stable and reliable. (3) parts of the process improvement through the transition to achieve the desired results. Collection draft date: 1993.1.8. (Continued from page 34) To the phenomenon of double diffraction, on the other hand, the film is to generate crossing pattern re-create one of the conditions fixed. This is also confirmed by experiments. electron microscopy observation has shown that there are more samples of corrugated diagram shown in Figure 2. and the formation of Kids in Sao pattern and the second diffraction is closely related. on the spot in Figure 1, the distribution of electron diffraction analysis shows that it is similar Turn the pattern map transition electron diffraction pattern corresponding to that column with the electron microscope more corrugated head rotation is consistent. It can be seen in Figure 1 the appearance of additional spots is the same structure with the relative rotation of two thin slices caused ,[link widoczny dla zalogowanych], ie, misorientation between slices. purpose and principle of double diffraction can be used to interpret them, the electron beam incident on the first layer of thin, resulting diffraction Cambodia, Cambodia this diffraction can be used as the second layer into the thin beam , the occurrence of the second diffraction, the formation of secondary diffraction spots, the diffraction pattern to generate additional spots. The detailed process can be illustrated in Figure 3. solid 38 is the first and second floors sheet of tough start diffraction pattern, the more large spots (such as P) represent the first layer of thin diffraction, and the smaller spots (eg, Q) represents the second thin layer of the diffraction point P if the thin film diffraction can be used as a second source, you get Figure 3b represented by hollow circles in the diffraction point (such as s), the l ~ p_-time reflections. This process is equivalent to P will be moved to the point of origin at this time point and the Q point of S is equivalent to Figure 3a, in order, consider the transmission spot with the first layer of sheet recently the remaining five spots in the diffraction as a second source of thin layers, that in Figure 3c, as shown in the diffraction pattern. By analogy, when the first thin film of the other diffraction spots (shown in solid regions other than 3a from the point of transmission diffraction spots far) have become the source of the second thin film diffraction, they produced shown in Figure 1 spot groups of two tablets of multiple diffraction. purpose of this , the result is a solid 1 second diffraction effects from the bow f, it and the thin difference between the orientation of the relevant Reference 1 Hersh P, mm Iraq A, Nicholson, Pa RB1 facilities in qDW. Whelan MJ . thin crystal electron withdrawal study. Science Press, 1983.1631652 unitary Liu, Huang Xiaoying, such as the array of jade. Materials Results chair of electron logo. Tianjin University Press, 1989,22 l ~ 224 draft Shikongshan Date】 992.4.27

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