共搜索到13084条信息,每页显示10条信息,共1309页。用时:0小时0分0秒421毫秒
金属断口宏观形貌几何特征定量测量及分析于斌1,靳庆臣1(1.甘肃省兰州市空间技术研究院兰州空间技术物理研究所)摘 要:利用自主开发的金属断裂面三维重构软件JHX-FSR,分析金属材料断口几何特征.介绍断口剖面轮廓线粗糙度,断口表面粗糙度,断口轮廓几何特征和断口宏观形貌局域区域的测量算法和定量分析方法.结果证实,通过断口三维空间数据场可以精确,快速地对断口宏观形貌几何特征进行定量分析. 关键词:金属材料; 断口形貌; 几何特征; 定量测量; 定量分析; 断口三维数据场......
a better fracture toughness for 7055-T7951 with a smaller striation space in Paris region. Key words: 7055 aluminum alloy; T7951 secondary aging; crack propagation; fracture surface morphology 1... 7055 aluminium alloys were tested under stress ratios (R) of 0.6, 0.05 and -1, respectively. The microstructures and fracture surfaces were analyzed by TEM and SEM. The results reveal that the crack......
. The compression strength is about 1 720 MPa and the elongation about 3.4%. The surface morphology of fracture shows a clear vein pattern. The characteristics of both compression behaviour and fracture... becomes a little disordered and some liquid drops can be observed in the fracture surface. Key words:CuZrTiMo bulk amorphous alloy; thermal stability; stress-strain curve; fracture morphology  ......
Effect of solidification rate on MC-type carbide morphology in single crystal Ni-base superalloy AM3 YU Zhu-huan (余竹焕)1, 2 , LIU Lin(刘 林)1, ZHAO Xin-bao(赵新宝)1, ZHANG Wei-guo(张卫国)1, ZHANG Jun(张 军...’an University of Science and Technology, Xi’an 710054, China Received 11 November 2009; accepted 21 March 2010 Abstract: In order to study the effect of the withdrawing rate on carbide morphology, MC-type......
Effect of titanium addition on fracture toughness behavior of ZL108 alloy WENG Yong-gang(翁永刚), LI Zi-jing(李姿景), LIU Zhi-yong(刘志勇), LIU Wen-cai(刘文才), WANG Ming-xing(王明星), SONG Tian-fu(宋天福) Key... strain fracture toughness KIC. The experimental data were analyzed by the statistical significance tests. The results show that the fracture toughness of the ZL108 alloy containing titanium......
for extruded state. With increasing the value of anK, fracture macro-morphology changes from a rough plane via multi-plane with step to V-type plane; and from single radiation zone to two zones of fiber and shear lip, respectively. Fracture micro-morphology changes from the brittle fracture to the ductile fracture. Fine grain and few fine dispersed second phase can enhance the impact toughness......
pattern because of the hard orientation resulting from rolling. While, when the tensile test was performed upon rolled Mg97Zn1Y2 alloy, a mixed fracture morphology including dimples, tear ridges... Tensile fracture of as-cast and hot rolled Mg-Zn-Y alloy with long-period stacking phase WANG Bai-shu(王柏树)1, 2, XIONG Shou-mei(熊守美)1, LIU Yong-bing(刘勇兵)3 1. State Key Laboratory of Automotive......
J. Cent. South Univ. Technol. (2011) 18: 1802-1807 DOI: 10.1007/s11771-011-0905-1 Fracture toughness of multiphase TiAl-Nb alloy in situ consolidated by spark plasma sintering YANG Xin(杨鑫)1, 2, XI... and fracture toughness were investigated by X-ray diffractometry (XRD), optical microscopy (OM), scanning electron microscopy (SEM) and mechanical testing. The results show that microstructure......
℃ 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......