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℃ for different time. And the tensile testing was carried out for these samples and the fracture morphology of the tensile test samples was also examined. The results show that the microstructures... in the fracture morphology. The granulation and discontinuous distribution of β-Mg17Al12 results in the deterioration of the ductility of AZ91D die cast magnesium alloy. Key words: AZ91D magnesium alloy......
; fatigue crack initiation; fatigue crack propagation; fracture morphology Foundation item: Project(14GYGG-2) supported by the Science and Technology Industrial Research Project of Baoji, China Received... microstructure(BM)(b) of alloy 图2 疲劳试验示意图 Fig. 2 Illustration of fatigue specimens (Unit: mm) 2 结果与讨论 2.1 裂纹萌生区断口形貌分析 图3 片层和双态的疲劳断口宏观形貌 Fig. 3 Macroscopic fracture......
K increase gradually from 355 and 120 MPa for ZK60 alloy to 380 and 164 MPa for ZK60-2.98Gd alloy, respectively. Extruded tensile fractures exhibit a typical character of ductile fracture. Key words: ZK60 magnesium alloy; Gd modification; extrusion; microstructure; mechanical property; fracture morphology 1 Introduction Magnesium alloys with high specific strength are used widely in automotive......
Effect of Cr on Microstructure and Fracture Toughness of Nb-20Ti-16Si-xCr Alloys () 摘要:The present paper reported the phase stability and microstructures evolution of Nb-20Ti-16Si-xCr (x = 0~20at... than 5% in Nb-20Ti-16Si-xCr alloys could result in the formation of Cr-rich Laves phase. In addition, the influence of Cr addition on the room temperature fracture toughness of the alloys after......
, respectively, and excellent flow property with the flow length of 1870-2420 mm. The die-cast tensile fractures at ambient temperature exhibit a typical character of ductile fracture. Key words: heat-resistant magnesium alloy; Mg-Al-Sm alloy; microstructure; mechanical property; flow property; fracture morphology 1 Introduction Magnesium alloys, one of the most important structural materials with high......
inhibition by nano-sized SiC particles. After HIP treatment, Al2O3/SiC nanocomposites achieved full densification and homogeneous distribution of nano-sized SiC particles. Moreover, the fracture morphology... and transgranular fracture. On the other hand, the fracture morphology of the HIP treated specimens was identical to that of the hot-pressed Al2O3/SiC nanocomposites[9-10, 31], which showed complete transgranular......
performance. Key words: Ohno continuous casting; surface quality; crystal orientation; mechanical property; fracture morphology 铝是最早被采用的键合丝材料之一.由于它具有密度小,成本低以及良好的导电(单位质量的导电能力是铜的两倍),导热和耐蚀性能等优点,在键合丝的生产中具有明显优势[1].热... and mechanical properties of aluminum wires were investigated. Besides, the microstructures of fracture surfaces of Al wires prepared under optimal process parameters were evaluated, and the relevant......
; microstructure; fracture morphology; grain morphology 1 Introduction Weight reduction has become one of the research focuses in the field of materials processing, which can be realized by optimized... of temperature on maximum expansion ratio Fig. 6 Vickers hardness at different temperatures 3.4 Fracture morphology The morphologies of fracture surface after bursting in different conditions observed......
Effect of Alloying on the Microstructure and Fracture Toughness of Nb-Mo-Si Alloys () 摘要:It was found that typical Nb_(ss) /Nb_5Si_3 eutectic lamellar structure formed in the Nb-Mo-Si alloy... structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar......
the fracture system provides the primary pathways for fluid flow in coal [35, 36]. Therefore, the changes in surface morphology of the coal matrix after thermal shocking and its influence on the fracture... J. Cent. South Univ. (2020) 27: 1846-1860 DOI: https://doi.org/10.1007/s11771-020-4412-0 Fracture evolution in coalbed methane reservoirs subjected to liquid nitrogen thermal shocking YAN Hong(严红......
