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Effect of Rare Earth Elements on Quenching Crack Resistance of Steel 9Cr2Mo 张兰萍1,杨庆祥2,郭铁波3,李慧2 (1.Development of Machinery and Electron, Jixi University,;2.College of Materials Science Engineering, Yanshan University,;3.College of Industry Technology, Harbin Science and Technology University,) Abstract:The effect of rare earth elements on quenching crack resistance of steel 9Cr2Mo......
FATIGUE CRACK PROPAGATION OF Ni-BASE SUPERALLOYS L.Z.Ma1,E.Barbero1,X.B.Liu1,K.M.Chang1 (1.Dept. of Mechanical & Aerospace Engineering, West Virginia University, Morgantown,WV 26506-6106, USA) Abstract:Time-dependent Fatigue Crack Propagation (FCP) behaviors of five Ni-base superalloys were investigated at various temperatures under fatigue with various holding times and sustained loading......
in the ATC composites is characterized by a more tortuous path, which will increase the propagating resistance of cracks. Fig.2 SEM images of Vickers indentation crack on polished surfaces... Fractal analysis of crack paths in Al2O3-TiC-4%Co composites LI Jing(李 静)1, 2 , YIN Yan-sheng(尹衍升)1 , LIU Ying-cai(刘英才)1, MA Lai-peng(马来鹏)3 1. Institute of Materials Science and Engineering......
propagation. If the releasing rate of strain energy G is always higher than the crack propagation resistance, the instable crack propagation R is created. The residual G-R can be changed into kinetic... Crack propagation of Mg-Li alloys by impact load QU Zhi-ming(曲志明)1, LIANG Xiao-ying(梁晓颖)1, ZHOU Xin-quan(周心权)2, SHI San-yuan(史三元)1 1. School of Civil Engineering, Hebei Engineering University......
on the reversibility of dislocation motion within the plastic zone close to the crack tip, the improved crack growth resistance is attributed to many precipitates that are coherent with Al matrix in the under... and precipitate free zone on the fatigue crack growth resistance are less significant than those of precipitates within grains of the alloy. Key words: 7055 aluminum alloy; ageing; fatigue crack growth rate......
University), Changsha 410083, China)Abstract:The strength, fracture toughness and fatigue crack growth resistance of 7050-T7451 aluminum alloy plate with different thicknesses (35 mm and 160 mm) were... fatigue crack growth resistance, by comparison to the thinner plate. The drop of strength is mainly attributed to grain coarsening in the thicker plate, and the increased degree of recrystallization......
J. Cent. South Univ. (2016) 23: 430-439 DOI: 10.1007/s11771-016-3088-y Experimental and numerical study on crack propagation in pre-cracked beam specimens under three-point bending Hadi Haeri... and numerical study on crack propagation in the pre-cracked beams specimens (concrete-like materials) is carried out using three-point bending flexural test. The crack propagation and coalescence paths......
Effect of Modified Polymer on Crack Resistance of Mortar马保国摘 要:<正>At present, the basic technical principle in China is to adopt polymers to modifying the properties of mortar so as to improve the crack-resistance of construction structures and to strengthen their water-resisting and climate-resisting properties as well. However, how polymer acts......
Impact of Rare Earth Element La on Microstructure and Hot Crack Resistance of ADC12 Alloy宋宪臣1,2,3,闫洪1,3,CHEN Fanhui1,31. Department of Materials Processing Engineering, School of Mechanical... & Processing in Nanchang City摘 要:The impact of rare earth element La on the microstructure and hot crack resistance of ADC12 alloy was analyzed. The additive......