The impact energy Cv of ESR austenitic steel 32Mn\|7Cr\|1Mo\|0.3N at 77K was 132J, and obviously higher than that of un\|ESR steel. After ESR the inclusion amount in steel decreased with homogeneous distribution, and the characteristic of fracture of steel was quasi\|cleavage.
电渣重熔32Mn7Cr1Mo0 .3N 奥氏体钢,在77 K 下的Cv= 132 J,显著高于重熔前的性能,重熔钢夹杂物数量减少且分布均匀,此时的断口为准解理特征。
SEM results of failure analysis showed that the main characteristic of fracture morphology of n ZrO 2/Ni coating was brittle,which could be improved by annealing.
The results show that the toughness characteristic of fracture morphology and impact toughness of steel plate with finishing temperature 840 ℃ and 1.0 mm reduction in finishing pass are an improvement over that with finishing temperature 890 ℃ and 1.5 mm reduction in finishing pass, therefore the influence of finishing temperature of rolling on impact toughness and fracture morphology of steel is obviously more that of reduction of rolling in finishing pass.
The fracture morphology near the higher temperature side of Horn-Shaped (Brittleness Temperature Range-BTR) shows that the cracked surface has the characteristic of fracture morphology of higher temperature crack-openning, that is, there are intergranular liquid films and/or liquidus bridges observed on the fracture surface.
It is established that a thermofluctuation character is characteristic of fracture of polymers in intense short-term loading.
Correlation between the work of fracture of specimens with a crack and the characteristic of fracture toughness G1c of a materia
The Weibull modulus (m) and the characteristic of fracture (σ0) parameters were determined for each material.
The solidification crack tendency of weld metals of fifteen types of fully austenitic stainless steels and heat-resistant cast alloys were overall quantitatively evaluated by using the tester having been carried out an improvement on Trans-Varestraint test and made in our institute. These indices-BTR of seven types of fully austenitic heat-resistant cast alloys and their corresponding solidification ductility curves have been first proposed in this paper. According to morphology regularity of solidification,...
The solidification crack tendency of weld metals of fifteen types of fully austenitic stainless steels and heat-resistant cast alloys were overall quantitatively evaluated by using the tester having been carried out an improvement on Trans-Varestraint test and made in our institute. These indices-BTR of seven types of fully austenitic heat-resistant cast alloys and their corresponding solidification ductility curves have been first proposed in this paper. According to morphology regularity of solidification, cracking occurring in weld metals during the testing, new points on solidification cracking have been advanced, such as the use of the two-dimensional temperature field to analyse the characteristic of fracture mophology corresponding to the solidification cracking, the "horn-fracture model of solidification cracks" and the approximately formula for calculating horn-fracture area of solidification cracks-S being served as a new index to quantitatively evaluate the solidification crack tendency of weld metals. Therefore a new approach is provided for the investigation of propagation mechanism of solidification cracks in weld metals .
Theoretical studying has indicated that the behaviour of surrounding medium of water has a large effect on the stress corrosion process of fracture in rock. So far, experiments made for stress corrosion in rock have been done under the situation of static water. In this experiment, the subcritical develop characteristics of fracture caused by stress corrosion n Yuennan marble samples under the situation of static and flowing distilled water have been studied respectively. The results show that flowing...
Theoretical studying has indicated that the behaviour of surrounding medium of water has a large effect on the stress corrosion process of fracture in rock. So far, experiments made for stress corrosion in rock have been done under the situation of static water. In this experiment, the subcritical develop characteristics of fracture caused by stress corrosion n Yuennan marble samples under the situation of static and flowing distilled water have been studied respectively. The results show that flowing of the medium of water around fracture may accelerate the stress corrosion process of the end of fracture. It is perharps of great signifieanse to the study of earthquake source process and the precursor just before earthquake.
The fracture appearance of Horn-Shaped propagation of solidification cracks occured in weld metals of two austenitic heat-resistant steels was presented in this paper. SEM observation was performed following the Trans-Varestraint test. The fracture morphology near the higher temperature side of Horn-Shaped (Brittleness Temperature Range-BTR) shows that the cracked surface has the characteristic of fracture morphology of higher temperature crack-openning, that is, there are intergranular liquid films and/or...
The fracture appearance of Horn-Shaped propagation of solidification cracks occured in weld metals of two austenitic heat-resistant steels was presented in this paper. SEM observation was performed following the Trans-Varestraint test. The fracture morphology near the higher temperature side of Horn-Shaped (Brittleness Temperature Range-BTR) shows that the cracked surface has the characteristic of fracture morphology of higher temperature crack-openning, that is, there are intergranular liquid films and/or liquidus bridges observed on the fracture surface. The fracture morphology near the lower temperature side of Horn-Shaped (BTR) shows that the cracked surface has the characteristic of fracture morphology of lower temperatme crack-openning, that is, intercolumnar ridge line and/or ring ridge or some bud segregation for fully austenitic cast steels. It is proposed that there are three stages in the process of complete columnar crystal growth in weld metals. The Ta maximum and Tb minimum isotherm of BTR (Horn-Shaped) were discussed.
characteristic of fracture
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