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revealed that dynamic changes in shear stiffness and the energy storage abilities of the rock discontinuities occurred in relation to the shear rate-dependent behavior of crack growth, which increased... was found to have no influence on the initial crack stress. Key words: shear rate-dependent behavior; rock discontinuity; dynamic evolution; initial crack stress Cite this article as: GU Lin-lin, WANG Zhen......
Effect of Ni Interlayer on Cavitation Erosion Resistance of NiTi Cladding by Tungsten Inert Gas(TIG)Surfacing ProcessZhen-Ping Shi1,2,Zheng-Bin Wang1,Ji-Qiang Wang1,Yan-Xin Qiao3,Huai-Ning Chen1,Tian... erosion resistance is NiTi plate> NiTi-Ni-TIG cladding> NiTi-TIG cladding> SS.The better cavitation erosion resistance of NiTi-TIG and NiTi-Ni-TIG claddings than SS substrate is due......
the weaker resistance to stress concentration and the micro-crack initiation relative to the matrix. Under the intense stress field at the tip of the micro-cracks, dislocations are easy to form pile-up...Trans. Nonferrous Met. Soc. China 24(2014) 303-309 Fatigue crack initiation and early propagation behavior of 2A97 Al-Li alloy Jing ZHONG1, Shen ZHONG1, Zi-qiao ZHENG1,2, Hai-feng ZHANG1, Xian-fu......
. 表1 镍铝青铜热处理工艺 Table 1 Heat treatment process of NAB 图1 疲劳裂纹扩展试样 Fig. 1 Schematic diagram of NAB specimen for fatigue crack growth test (Unit: mm) 2 结果与分析 2.1 热处理对材...此,可以用Paris方程拟合曲线. 图5 热处理试样的拉伸断口形貌 Fig. 5 Fracture morphologies of NAB alloys under different heat treatments 图6 NAB疲劳裂纹扩展曲线 Fig. 6 Fatigue crack growth curves of NAB alloy......
words: GH4169 alloy; electron-beam welding; welding crack 1 Introduction Superalloys are mainly used in the aerospace, petrochemical, metallurgical, and automobile industries, and are especially... in aeroengine applications. It has high-temperature strength and excellent corrosion resistance,and it is easy to process at 700 °C and exhibits oxidation resistance at high temperatures. So, it is widely used......
; corrosion resistance; zirconia; alloying element; lateral crack Foundation item: Project(51601075) supported by the National Natural Science Foundation of China Received date: 2016-04-21; Accepted date...生于具有较大起伏的波峰之上的结果具有良好的一致性(见图3)[15]. 图3 氧化膜转变前的组织细节,裂纹处于界面起伏的波峰上[15] Fig. 3 Details of microstructure of oxide pre-transition, crack is located on crest of undulation[15] LIKHANSKII等[8]认为氧化......
Crack spacing threshold of double cracks propagation for large-module rackZHAO Tie-zhu(赵铁柱), SHI Duan-wei(石端伟), YAO Zhe-hao(姚哲皓), MAO Hong-yong(毛宏勇), CHENG Shu-xiao(程术潇), PENG Hui(彭惠) (School... inclusions and surface cracks. To ensure its safety in the future service, studying on crack propagation rule and the residual life estimation method of large-module rack is of great significance......
normal force Ni and shear resistance Ti. While with the flowing of crack water in, it begins to decrease for hydraulic action mentioned above. Due to the action of hydrostatic pressure σw in Eq.(12... mechanics, the propagation of cracks on rock slope and the development of sliding surface were researched. Then based on hydraulics formulas and using Sweden arc method, the influence of crack water......
heating. This tensile stress results in the formation of cracks in the oxide layer. Key words: Fe-9Cr-1Mo steel; water vapor; cyclic oxidation; crack ... at 650 ℃ are to improve the oxidation resistance and long-term creep rupture strength [4]. In recent years, various Cr-Mo ferritic heat-resistant steels have been developed for use as main steam pipes......
