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succeeding heat-treatment at 650℃, but less B19′ phases after 750℃ treatment are found. The fracture morphology of the film heated at 550℃ shows a flat pattern with more steps, whereas that of the film...; sputter deposition; crystallization; martensitic transformation; fracture morphology; nano-hardness CLC number: TG139. 6 Document code: A 1 INTRODUCTION Shape memory thin film is regarded......
of TC4 screw bolts produced by WST 2 结果与分析 图2所示为MJ12螺栓106 000次疲劳断裂试样断口宏观形貌. 图2 试样断口宏观形貌 Fig.2 Fracture morphology of sample 从图2可以看出试样断口表面比较平整,疲劳源区,裂纹扩展区和瞬时断裂区明显.宏观形貌上发现6个裂纹源,且...进行显微组织分析和疲劳断口观察.研究表明,该试件疲劳断口属于典型疲劳韧性断裂,未发现冶金及组织缺陷,材料显微组织细小均匀. 关键词:TC4;显微组织;疲劳断口 中图分类号:TG146.2+3 文献标志码:A Fatigue fracture of TC4 fasteners ZHANG Peng1, 2, LAI Yun-jin1, 2......
J. Cent. South Univ. (2012) 19: 17-21 DOI: 10.1007/s11771-012-0966-9 Effect of heat treatment of Mn-Cu precursors on morphology of dealloyed nanoporous copper TAN Xiu-lan(谭秀兰)1, LI Kai(李恺)1, NIU Gao... a free corrosion method. The effects of heat treatment of Mn-Cu precursors on alloy phase, morphology and composition of the resultant nanoporous copper were investigated. It is revealed......
) Abstract: The ferrite morphology of the X70 pipeline steel surface was observed with metallographic microscope, and the content of chemical elements of X70 pipeline steel was analyzed with energy... testing (SSRT) at room temperature and 60 ℃, respectively. The fracture morphologies of the specimens were analyzed, the effect of temperature on stress corrosion cracking (SCC) sensitivity of X70......
and tempering, the surface compressive stress increases to the highest. Key words: cemented carbide; heat treatment; microstructure; fracture morphology; combination property Foundation item: Project...;Fracture morphologies of each specimen 表4 不同热处理下ZL40.5硬质合金的性能 Table 4 Performance of ZL40.5 cemented carbide under different heat treatment 2.5 残余应力分析 由于硬质合金淬火,深冷时具有很大的冷却速度,且Co相膨胀系数是......
; high temperature fatigue; fracture 1 Introduction Automobile industry is one of the pillar industries for national economy in many countries [1,2]. With the development of technology and increasing...-temperature alternating loads, a part is prone to have fatigue fracture, which seriously affects the life and reliability of the part [6-10]. Therefore, the study on enhancing the high-temperature......
Improvement of Fracture Toughness Lanthanum Zirconate DAI H1,CAO X Q1,LI Q1,LI J Y1,ZHONG X H1 (1.Key Lab of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese... temperature applications. The fracture toughness and microhardness of nanocrystalline LZ (n-LZ), microcrystalline LZ (m-LZ) and LZ-5mol%8YSZ (LZ-5-8YSZ) composite (8YSZ for zirconia stabilized by 8 mol......
the elongation increases with the increase of temperature. The results of SEM fracture analysis show that the tensile fracture is transgranular below 300 ℃, the morphology changes gradually from transgranular... properties of the casted sample were tested at 250, 300, 350, 400, 450, 475 and 500 ℃, respectively, after homogenizing annealing treatment. The high temperature deformation and fracture behavior......
J. Cent. South Univ. Technol. (2011) 18: 6-15 DOI: 10.1007/s11771-011-0651-4 Morphology and growth of porous anodic oxide films on Ti-10V-2Fe-3Al in neutral tartrate solution YI Jun-lan(易俊兰... anodizing time. Scanning electron microscopy (SEM) and field emission scanning electron microscopy (FE-SEM) were used to investigate the morphology evolution of the anodic oxide film. It is shown that above......
Micro and sub-micro morphology of Mg65Cu25Y10 bulk amorphous alloy containing primary crystalline phases GUAN Le-ding(关乐丁)1, 2, YAN Biao(严 彪)1, 2, YANG Sha(杨 沙)1, 2 1. Shanghai Key... and morphology of the prepared alloy. Under micro condition, the sample alloy is composed of amorphous structure with cauliflorate shape, primary CuMg2 dendrite phase, mixed primary CuMg2 and Cu2Y......