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已有 272 次阅读  2011-12-20 23:21   标签mulberry 

Smooth specimen creep rupture


In a linear relationship. Test character sets relationship 8 = Aa. ,mulberry, F-= ~,, r'e '= c: constant = add, (a). High-temperature creep rupture at room temperature so far not been as high as the level of fracture mechanics, there are many issues to study. As the creep rupture and fracture mechanics approach is different creep rupture by the chemistry, physics, metallurgy and other factors, more complex fracture mechanism. Can not believe that mechanical factors play a decisive role. Some issues to be studied. Therefore, to describe the creep rupture properties of the system is very difficult. This article describes the creep rupture properties and parameters of the general relationship between the initial selection of the macro does not have defective smooth specimens, the creep rupture test,mulberry, will help to in-depth study of creep rupture. 2 creep rupture properties and creep rupture that relationship parameters for the third stage of creep-induced fracture. Therefore, creep rupture is based on the variation of creep deformation caused to the final fracture. When the creep to the third stage, the speed, sample produce necking, to break. Is generally believed that the same creep rupture and creep process. On the creep rupture point of view, there is transgranular and intergranular fracture. Low temperature and high stress produced transgranular fracture} high temperature low stress intergranular fracture. Fracture occurred divided into (1) the production of grain boundary wedge hole: (2) any part in vain along the grain boundaries resulting spherical hole} (3) crystal to generate the hole. These holes occur in the initial creep test. Therefore, steady-state creep rate and rupture and creep cavities to accelerate the growth process are closely related. Fracture time () and steady-state creep rate (e) available (1) that t,mulberry outlet, · 8: G: constant (1) The steady creep rate and stress kit (mouth) and temperature () related. Break between the time the relationship between temperature and vertical force available (2) (3) the expression t. : Aa one. = Aexp () (2) (3) If (1) (2) (3) are logarithmic. May be clear that the fracture time with the steady-state creep rate,ed hardy vaatteet, stress, temperature, linear relationship. Breaking manuscript friends present period t1992 1 778 Fang Li and l6 day test 1993 2 5 test and the results of tests with GH33A alloy, chemical composition shown in Table 1. Alloy double vacuum smelting process. After 10g0 ~ C8 hour air-cooled air-cooled} 750 ~ CI6 hours after treatment, processed into 8 × 100mm diameter creep specimen. Then type in domestic RD23 high temperature creep and rupture strength testing machine,mulberry tasker, according to GB2039-80 test method for tensile creep of metal 700 ℃, under different virtual power creep rupture test. Deformation measurement using a differential transformer. When the tests prior to fracture, deformation rapidly accelerate,abercrombie singapore, remove the differential head. Trial to continue. Induced to fracture, a list of 2 results, and get creep rupture time and elongation of the relationship (circle 1). Relationship between time and stress fracture (Figure 2). Steady-state creep rate and rupture time relationship (Figure 3). 2 bedroom 1GlH53A by the chemical composition of box sets, it is clear that with the stress of the different fracture is different. 1 and Table 2 by the quiet shows the steady-state creep rate with stress also vary. From Figure 2 and Figure 3 it is clear that the time and stress fracture, a linear relationship between steady-state creep rate. With the increased stress fracture time decreased, while the steady-state creep rate increased. Experimental results show that creep rupture in the acceleration creep before the creep properties with the same experience and meet the creep relationship,ralph lauren outlet, with the match. Chang L, snapped. Figure l h time, h circle 2 Note. What the value of virtual coordinates good I; [l0993 No. 2 Shiu-Li test 79 Conclusion (1) The test results showed that creep rupture according to the variation of creep rupture. (2) creep fracture, creep characteristics and the same as before the break. Rupture life with the temperature,ugg outlet, stress, steady-state creep rate had a secret relationship between plane and meet all of the creep equation. (3) is different from the normal temperature creep rupture fracture mechanics. Creep rupture affected by many factors, there are many issues to be future in-depth study. Xing Lu Zhuan 10.310 'cross-tung rate E / h 3-hsiang 2GH55A7O0. C ■ change fracture test results (on the next page 83) Conclusion (1) rapid quenching of liquid nitrogen has a strong quenching installed capacity of children, up to 500 degrees per second. (2) The device uses a pressurized liquid ammonia and the clever ways in which the device is designed with a new and unique features. (3) observed a thick iron chain lateral pull of the prior eutectoid ferrite formation region,abercrombie düsseldorf, should be considered as a proeutectoid iron chain body of a form. (4) is clearly observed in the proeutectoid ferrite, granular formation of Tony's pension,mulberry outlet, the device is really high-temperature solid-state materials research Resentment is the ideal tool for the phase transition.
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