共搜索到18884条信息,每页显示10条信息,共1889页。用时:0小时0分0秒484毫秒
EFFECT OF MELT OVER-HEATING AND ZIRCONIUM ALLOYING ON THE MORPHOLOGY OF Al9FeNi PHASE AND MECHANICAL PROPERTIES OF 2618 ALLOY J.H.Wang1,D.Q.Yi2 (1.Mechanical Engineering Institute of Xiangtan... of Al9FeNi phase in 2618 aluminumalloy with high contents of Fe and Ni and 0.22wt.% zirconium has been investigatedby optical microscopy, SEM and TEM. The mechanical properties of 2618 aluminumalloy after hot......
Thermostability of Al-Cu-Mg-Fe-Ni Alloy with Trace Scandium and Zirconium Yu Kun1,Li Songrui1,Li Wenxian1 (1.Department of Materials Science and Engineering, Central South University of Technology,Changsha 410083, P. R. China) 摘要:Three Al-Cu-Mg-Fe-Ni-Sc-Zr ingot metallurgy alloys with different compositions had been prepared. The hardness variations of cold-rolled alloy plates during annealing......
chemical compositions in mass fraction were: 1.20%- 1.70% Sn, 0.18%-0.24% Fe, 0.07%-0.13% Cr. The cylindrical specimens with c axis parallel to the normal direction (ND) were cut from the plate... Trans. Nonferrous Met. Soc. China 22(2012) 2402-2408 Microstructural evolution of zirconium alloy under dynamic compression at strain rate of 1000 s-1 ZOU Dong-li, LUAN Bai-feng, LIU Qing College......
Zr-Sn-Nb-Fe-Cr合金的电子束焊接性能研究 张建军1,周青山1,周军1,李中奎1,王文生1,田锋1 (1.西北有色金属研究院难熔金属研究所,陕西,西安,710016) 摘要:研究了Zr-Sn-Nb-Fe-Cr锆合金真空电子束焊接样品的拉伸和抗腐蚀性能,结果表明,焊接样品室温和375 ℃的拉伸性能略低于母材;焊接样品在500 ℃过热蒸汽中腐蚀500 h未出现疖状腐蚀现象,但腐蚀增重略大于母材;在400 ℃过热蒸汽中腐蚀320 d及360 ℃水中腐蚀520 d,样品焊缝处颜色均为黑亮,未出现白色,棕色等腐蚀产物.根据实验结果拟合出了焊接样品的腐蚀增重曲线. 关键词:Zr-Sn-Nb-Fe-Cr锆合金; 电子束焊接; 性能; [全文内容正在添加中] ......
an obvious refinement effect on the cast grain of magnesium and its alloys without the alloy element Al because the crystal structure of zirconium is the same as magnesium matrix, and the lattice parameters are close to magnesium. Zirconium can decrease the grain size of magnesium from 150 to 20 μm. The rare earth cerium also has a grain refinement effect on Mg and Mg-Al alloy. The cerium atoms tend......
manufacturing method of metal zirconium[5-6]. There are three procedures during Kroll process to produce sponge zirconium: 1) decomposition of zircon sand and preparation of ZrCl4; 2) separation of Zr and Hf; 3... by toxic chlorine gas,which cause higher price for zirconium and then restrict its application. So new preparation technology for zirconium and its alloy need to be developed, which is short process flow......
the recrystallization maps. LIU et al [13] investigated the microstructural evolution of Zr-Nb-Sn-Fe-Cr alloy at 590 °C for 1 and 2 h, which is insufficient to characterize the details.... [11] LUAN B F, CHAI L J, CHEN J W, ZHANG M, LIU Q. Growth behavior study of second phase particles in a Zr-Sn-Nb-Fe-Cr-Cu alloy [J]. Journal of Nuclear Materials, 2012, 423(1): 127-131. [12] TIAN H......
Formation process of composite plasma electrolytic oxidation coating containing zirconium oxides on AM50 magnesium alloy LIU Feng, SHAN Da-yong, SONG Ying-wei, HAN En-hou State Key Laboratory... show that the coating formed on Mg alloy is mainly composed of MgO and MgF2 when the applied voltage is lower than the sparking voltage, and zirconium oxides start to be deposited on Mg substrate after......
of yttrium in zirconium alloy,the lattice parameters of a-Zr phase in Zr–Y alloy were accurately determined by X-ray diffraction(XRD).Yttrium exhibits solid solubility extension in the cast zirconium... shows a eutectic structure with dendrites formation when the Y content is higher.Yttrium exhibits a strong grain refining effect on zirconium alloy and precipitates from the metastable supersaturated Zr......
analysis method and the foaming agent TiH2 was commonly used for the comparison. The improved sessile drop device was used to research the wetting behaviors of Al alloy on the surface of hydride.... Key words: foam aluminum; melt-based route; zirconium hydride; wettability  ......