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fracture characteristic
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  断裂特征
    Fracture characteristic of Al_2O_3 ceramics by strong laser shock processing
    强激光冲击波作用下Al_2O_3陶瓷材料的断裂特征
短句来源
    Test and evaluation on fracture characteristic of high content fly ash concrete
    高掺量粉煤灰混凝土断裂特征的测试与评价
短句来源
    The fracture characteristic of high fly ash volume concrete is studied,testing and evaluating the fracture characteristic and fracture toughness of different fly ash volume concrete,different fracture degree of depth,and many kinds of fly ash volume concrete. The comparative analysis to the peak load,the largest stress and fracture toughness of the different fly ash volume concrete,and multiregression equations of the peak load,the largest stress and fracture toughness are built according to the reality testing the data.
    研究了高掺量粉煤灰混凝土的断裂特征,对不同掺量粉煤灰混凝土的断裂特征以及不同断口深度、断裂韧性进行了测试评价,对不同掺量的粉煤灰混凝土的峰值荷载、最大应力、断裂韧度进行对比分析,并根据测试结果建立了峰值荷载、最大应力、断裂韧度的多元回归方程。
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  fracture characteristic
In particular, such steels can be susceptible to delayed fracture characteristic for high-strength steels with a martensite or bainite structure.
      
The microstructure and fracture characteristic of a pressureless-sintered (Si-Al-O-N)-6 wt% SiC composite have been investigated by a combination of transmission electron microscopy and microindentation fracture technique.
      
Fracture characteristic of a (Si-Al-O-N)-SiC composite studied by transmission electron microscopy
      
Typical fracture characteristic values like load-displacement curve and specific fracture energy of the new wood laminate compound PARALLAM? PSL were determined by using the wedge splitting technique.
      
The fracture characteristic of this cultivar was that a few large fractures occurred globally.
      
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In this paper, four types of alumina ceramics with different microstructures have been used to investigate the relationship between the mechanical and thermal properties of the ceramics. The thermal shock resistance parameters have also been calculated. Based on the theory of thermal elasticity, the fracture characteristics of thermal shock resistance of alumina ceramics are discussed. At the same time, a concept of energy balance is used to analyse the process of thermal shock damage on the basis of fracture...

In this paper, four types of alumina ceramics with different microstructures have been used to investigate the relationship between the mechanical and thermal properties of the ceramics. The thermal shock resistance parameters have also been calculated. Based on the theory of thermal elasticity, the fracture characteristics of thermal shock resistance of alumina ceramics are discussed. At the same time, a concept of energy balance is used to analyse the process of thermal shock damage on the basis of fracture mechanics. It has been found that, having a high strength and low fracture toughness and modulus of elasticity, the type of Ⅳ-Al_2O_3 ceramics doped with MgO and CaO is characterized by high thermal shock resistance. The type of Ⅰ-Al_2O_3 ceramics doped with MgO is characterized by the resistance to propagation of microcracks resulted in thermal shock. Namely, it is characterized by high thermal damage resistance. The thermal shock resistance, of the type Ⅱ-Al_2O_3 and Ⅲ-Al_2O_3 ceramics doped with CaO and MgO lies between that of the former two. It is obvious that the thermal shock bchaviour of ceramics is a combined character of mechanical and thermal properties. The thermal stresses resulted from quenching temperature difference are the driving force for thermal failure. In the other hand, the mechanical properties usually act as a rote of resistant force, which hinders the crack propagation.

本文研究了四种Al_2O_3瓷的力学、热学性能与其显微结构间的关系。文中从热弹性理论出发,讨论了Al_2O_3瓷的抗热震断裂特性并用断裂力学的能量平衡观点,分析了材料的抗热震损伤行为。指出:在四种材料中,高强度和低韧性、低模量的钙镁系Ⅳ-Al_2O_3瓷具有较好的抗热震断裂特性;强度较低而韧性较好的钙系Ⅰ-Al_2O_3瓷具有较高的抵抗热震诱发微裂纹进一步扩展的能力,亦即有较好的抗热震损伤特性。钙镁系Ⅱ-Al_2O_3和Ⅲ-Al_2O_3瓷的抗热震性处于上述两者之间。显然,陶瓷材料的抗热震行为是其力学和热学性能的综合表现。温差热应力是材料破坏的动力,材料固有的力学性能往往是抵抗裂纹的萌生或扩展的阻力因素。

In this paper, fracture characteristics of a new type of ceramic matrix composite, that is SiC whisker reinforced ZTA (Y) have been stUdied. Analyses indicate that cleavage fractures are main way in the composite matrix, fractures along grain boundary occur in larger grains of the matrix. ZrO2(t) martensitic phase transformation to ZrO2(m) occurs in process of the fracture. Whiskers pullout are visible. The tensile stress introduced by the whisker makes crack growth way more complex....

In this paper, fracture characteristics of a new type of ceramic matrix composite, that is SiC whisker reinforced ZTA (Y) have been stUdied. Analyses indicate that cleavage fractures are main way in the composite matrix, fractures along grain boundary occur in larger grains of the matrix. ZrO2(t) martensitic phase transformation to ZrO2(m) occurs in process of the fracture. Whiskers pullout are visible. The tensile stress introduced by the whisker makes crack growth way more complex. All of the above are assistant to increase fracture toughness of the ceramic matrix composite.

本文研究了一种新型的陶瓷基复合材料-SiC晶须补强ZTA(Y)陶瓷材料的断裂特性.分析表明,复台材料基体以解理断裂为主,沿晶断裂出现在晶粒粗大的场合.断裂过程中发生了ZrO2(t)→ZrO2(m)的马氏体相交.断裂时晶须的拔出是明显的,晶须引入基体的张应力将使裂纹扩展途径更为曲析,这都将有利于复合材料断裂韧性的增加.

The micro structures and the tensile properties at room temperature of the Fe 28Al 5Cr 0.3B 0.003Mg alloy have been examined with various holding temperatures in several phase zones and at different cooling rates. It was found that, thermally mechanical treatments can improve the alloys strength and toughness and the comprehensive tensile behaviours of the samples with B2 structure and with no re crystallization structure possess optimum tensile behaviours. In addition there is an intrinsical...

The micro structures and the tensile properties at room temperature of the Fe 28Al 5Cr 0.3B 0.003Mg alloy have been examined with various holding temperatures in several phase zones and at different cooling rates. It was found that, thermally mechanical treatments can improve the alloys strength and toughness and the comprehensive tensile behaviours of the samples with B2 structure and with no re crystallization structure possess optimum tensile behaviours. In addition there is an intrinsical relationship existing between microstructure, fracture characteristics, strength and toughness of the alloy tested.

研究了在不同相区保温和控制冷却速率的Fe-28Al-5Cr-0.3B-0.003Mg合金的微观组织和室温拉伸性能,发现热机械处理可提高该材料的强韧性,而未再结晶并具有B2结构的试样的综合拉伸性能最佳;微观组织、断裂特征和强韧性能之间存在内在联系

 
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