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tough fracture     
相关语句
  韧性断裂
     PC/MBS blends showed tough fracture when the content of MBS was 10%.
     MBS质量含量达10%时,PC合金开始表现为韧性断裂;
短句来源
     The 77K fracture surfaces of ESR steel mainly composed of dimples and exhibit a tough fracture character.
     ESR钢77K冲击断口为韧窝占主导的韧性断裂特征。
短句来源
     Only 20% of GPE could make the blend from brittle fracture transmute to tough fracture.
     GPE能明显改善共混体系的相容性,提高共混体系的冲击强度,仅用20%的GPE就能使共混物由脆性断裂变为韧性断裂.
短句来源
     The results showed EPO had good toughening effect on PP, when the content of EPO was 4 phr, PP changed from brittle fracture to tough fracture;
     结果表明 :弹性体EPO对PP有很好的增韧效果 ,当EPO用量为 4份时 ,PP从脆性断裂转变成韧性断裂 ;
短句来源
     The inactivation form of Al-4.7%Cu alloy sample that is not directional solidification is brittle fraction while that of directionally solidified Al-4.7%Cu alloy sample treated by different superheat treatment is tough fracture. The mechanics property of directionally solidified sample is better than that of none directionally solidified sample, the strength of the former increases by 60% and the elongation increases by nearly 100%.
     Al-4.7%Cu合金非定向凝固试样失效形式为脆性断裂,而经不同熔体过热处理后Al-4.7%Cu合金定向凝固试样失效形式则表现为韧性断裂,定向凝固试样力学性能比非定向凝固的要好,强度提高了近60%,延伸率提高了近一倍;
短句来源
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  韧性断口
     Mechanical properties of the quenched ZA53 alloy is σ_b =245 MPa and δ= 12% and the fracture morphology transforms from mixed fracture to tough fracture due to microstructure fully transforming single solid solution phase after solid solution at 343℃for 17 h.
     在343℃固溶17h淬火后,合金组织完全转变为单相固溶体,合金的室温力学性能较好,σb=245MPa,伸长率为12%,合金的拉伸断口形貌由混合型断口转变为韧性断口
短句来源
     The fracture surface of 1Cr18Ni9Ti steel welded joint exhibits hybrid tough fracture of dimple and tear ridge,and dimple becomes tiny and uniform with the temperature decreasing.
     拉伸试样断口形貌分析结果显示,1Cr18Ni9Ti钢焊接接头的拉伸试样断口均为韧窝和撕裂棱混合型韧性断口,韧窝随温度的降低而变得细小、均匀。
短句来源
     The results show that the strength and elongation of the TIG welded joint is higher than that of the MMA at 77K. The fracture surface of 1Cr18Ni9Ti steel welded joint exhibits hybrid tough fracture of dimple and tear ridge , and dimple of the TIG welded joint fracture surface is tiny and uniform.
     结果表明:在77K下,1Cr18Ni9Ti钢TIG焊接头的强度、伸长率均比MMA焊接头的高; 两者拉伸断口均为韧窝和撕裂棱混合型韧性断口,但TIG焊接头断口中韧窝的尺寸细小而均匀。
短句来源
     The results show that the bending strength of linear friction welded joint of GH4169 is proportional to the bonding rate and the fracture is tough fracture.
     结果表明,GH4169线性摩擦焊接头的弯曲强度与焊合率成正比线性关系,断口为韧性断口;
短句来源
     The Mg nanoparticles/PP composite exhibit tough fracture characteristics compare to PP which shows the brittle fracture at impact.
     扫描电镜分析表明,由于纳米Mg的存在,冲击断口由纯PP的脆性断口转变成纳米Mg/PP复合材料的韧性断口
短句来源
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  “tough fracture”译为未确定词的双语例句
     However, the TiC Al 2O 3/Fe cermets exhibit obvious characteristic of tough fracture with Fe content increasing.
     Ti C- Al2 O3复相陶瓷为典型的脆性断裂 ; 随着 Fe含量的增加 ,材料具有明显韧性断裂的特征
短句来源
     The micro appearance observation of the impact fracture showed that the fracture pattern of the nanometer TiO2/UPR changes from typical brittle to typical tough fracture near the critical point.
     在扫描电子显微镜下观测纳米TiO2/UPR的冲击断口形貌时发现,在脆-韧转变点附近纳米TiO2/UPR的微观形态发生了从脆性断裂到韧性断裂的形貌特征.
短句来源
     On the contrary, the composite prepared by PIP showed tough fracture behaviors, which could be rationalized on the basis of a weakly bonded fiber/matrix interface as well as higher strength retention of the fibers. As a result, in comparison with the composites prepared by PP-HP, the composites prepared by PIP achieve better mechanical properties with a flexural strength of 703.6MPa and fracture toughness of 23.1Pa·m1/2.
     而采用先驱体浸渍-裂解法制备复合材料时,由于致密化温度较低,复合材料中纤维与基体的界面结合较弱,而且纤维的性能保留率较高,因此,纤维能够较好地发挥补强增韧作用,复合材料具有较好的力学性能,其抗弯强度和断裂韧性分别为703.6MPa和23.1Pa·m1/2.
短句来源
     In the four PMSBRS obtained through different modification methods,PMSBR-4 prepared by multilayer latex graft method is optimum for modification of PVC. The improvement of impact strength for rigid PVC and cold resistance for soft PVC is better than that of P83.The results of SEM, TEM and DMA show that PVC/PMSBR -4 blends have the characteristic of tough fracture.
     用不同改性方法制得的四种PMSBR中,以多层乳液接枝改性的PMSBR-4对PVC的改性效果最佳,用它改性硬质PVC的缺口抗冲击强度和软质PVC的耐寒性,效果皆超过粉末丁腈P83。
短句来源
     The fracture surface morphology of epoxy resin E 51/dicyandiamide(E 51/dicy) curing system toughened by chain extended urea containing polyether has been investigated by SEM as function of the morphology, dynamic mechanical behavior and impact strength. The fracture surface of the modified systems was found to display tough fracture feature, markedly different from that of the unmodified system.
     用扫描电镜 (SEM)系统研究了聚醚扩链脲增韧的环氧树脂 E-5 1 /双氰双胺 (dicy)固化体系的断裂面形态结构 ,并对断裂面形态结构与体系动态力学行为、冲击性能之间的关系进行了探讨 .
短句来源
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  tough fracture
The concept of partially tough fracture is introduced, which is observed in a wide range of operating temperatures.
      
At temperatures above Tbu the specimens bend with α=120°C without fracture, consequently, the Mo-Re alloys like pure molybdenum develop no tough fracture.
      
The plastics made from the 2 M urea-modified soy proteins showed improvements in elongation, tough fracture behavior, and water resistance.
      


In this paper, the relation between the low-temperature impact toughness and fracture mode of the low-carbon high-manganese cast steels is studied. Experimental results show that the fracture of this cast steels at room temperature are essentially of the trans-granular tough fracture mode, while it appeares essentially as the intergranular mode at -196℃. There are certain correlations between the impact values, sizes of dimples and testing temperatures: the impact values are higher and the dimples are...

In this paper, the relation between the low-temperature impact toughness and fracture mode of the low-carbon high-manganese cast steels is studied. Experimental results show that the fracture of this cast steels at room temperature are essentially of the trans-granular tough fracture mode, while it appeares essentially as the intergranular mode at -196℃. There are certain correlations between the impact values, sizes of dimples and testing temperatures: the impact values are higher and the dimples are bigger and deeper at room temperature than those at cryogenic temperatures. It has also been found that the non-metallic inclutions have remarkable effect on the dimensions of dimples.

本文研究了低碳高锰铸钢冲击韧性和断口形貌之间的关系.试验结果表明,室温时该铸钢断裂形式以穿晶韧性断裂为主,而在—196℃时断裂则以沿晶韧性断裂为主.在试验温度、韧窝尺寸和冲击值之间有着一定的对应关系:室温时冲击值较高,韧窝大而深;深冷温度下冲击值较低,韧窝小而浅.同时发现非金属夹杂物对韧窝的大小有着显著的作用.

A new maraging steel,Mn-Mo-co steel,has been made with the aim ofsaving the alloy elements,Co and Ni.Although the strength of the steel can reaoh to or even overtake the strength level of commercial 18Ni maraging steel,the toughness of this steel is quite low.It is probably that the second phases vere precipitated along the grain boundaries before the ageing pro-cess to be carried out. In order to improve the properties of the steel,a rapid solidification technique has been used and the relationships between...

A new maraging steel,Mn-Mo-co steel,has been made with the aim ofsaving the alloy elements,Co and Ni.Although the strength of the steel can reaoh to or even overtake the strength level of commercial 18Ni maraging steel,the toughness of this steel is quite low.It is probably that the second phases vere precipitated along the grain boundaries before the ageing pro-cess to be carried out. In order to improve the properties of the steel,a rapid solidification technique has been used and the relationships between structures and mechanical properties have been studied as well. The experimental results shown that the rapid cooling thin metal belt has a very fine grain size and high solid solubility of alloy elements.In thls microstructure,the vacancies and dislocation are so high that an homogeneous cell structure are formed.The transverse section of the rapid cooling belt consists of two layers,upper and lower layers.The microstructure of lower layer which is direct contact with the roller surface consists of equiaxed fine crystals with a diameter less than lμm,and the upper layer make up of fine columnar crystals.It has been also found that the rapid cooling layer always has a tough fracture,but columnar crystal layer,i.e.upper layer, usually has a cleavage fracture. In the ageing condition, the hardness of the rapid cooling belt is always higher than that of quenched steel having the same chemical composition. However,other mechanical properties of the mi-crocrystal steel formed by rapid solidification are still remained for further investigation.

Mn—Mo—Co马氏体时效钢是为节镍节钻而设计的一种新的马氏体时效钢,虽然强度可以达到甚至超过马氏体时效钢的水平,而韧性却低的多。其主要原因是时效前已有大量析出相沿晶界分布。为改善其性能,本文研究了液态激冷Mn、Mo、Co马氏体时效钢的组织结构,时效温度与部分机械性能的关系。 实验结果表明:激冷带具有极细的晶粒和较大的固溶度。由于激冷带保留了液态的大量空位和位错,因此,形成了明显的胞状组织,激冷带的横断面分为上,下两层,在接近辊面的激冷层内,为直径小于1μm的细等轴晶,其上部为细柱状晶的组织。并发现激冷层为韧性断口,柱晶层为解理断口。经时效处理后,其硬度普遍高于相同成份的淬火钢的时效硬度。关于液态激冷钢铁微晶材料的机械性能有待进一步研究。

The damage theory is used to study the region of the crack tip and the crack tip damage field is obtained. A near-field damage criterion D|r=dr =Dc is proposed based on micro experimental analysis and the relationship δc-dT between macro mechanical parameter and the microstructural parameter of material is established. The microstructural change around the crack tip during experimental loading as well as crack propagation has been observed with SEM. The damage criterion relationship is verified by experimental...

The damage theory is used to study the region of the crack tip and the crack tip damage field is obtained. A near-field damage criterion D|r=dr =Dc is proposed based on micro experimental analysis and the relationship δc-dT between macro mechanical parameter and the microstructural parameter of material is established. The microstructural change around the crack tip during experimental loading as well as crack propagation has been observed with SEM. The damage criterion relationship is verified by experimental results and it is shown that the stress, strain and damage at a certain distance from the crack tip are important factors for the control of tough fracture.

本文应用损伤理论研究裂纹尖端区域,得到了裂纹尖端的损伤场。根据细观实验分析提出了一个近场损伤准则,建立了宏观力学参量与材料细观组织参量之间的关系,并用实验结果进行了验证。

 
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