共搜索到660条信息,每页显示10条信息,共66页。用时:0小时0分0秒635毫秒
, Schneider a, Sauthoff g, FROMMEYER G. Mechanical properties of Fe-Al-M-C (M=Ti, V, Nb, Ta) alloys with strengthening carbides and Laves phase [J]. Intermetallics, 2005, 13(12): 1256-1262. [25] Miedema......
Roman" w:st="on">[10, 18],杆状的相和盘状的相都是具有Laves结构的MgZn2相.镁 合金的低温塑性变形除孪生外,主要靠基面滑移,而位错在基面上运动时杆状相对它的阻碍作用大于盘状 相
)),该相为过渡相β′(MgZn),其具有Laves相结构,该相在脱溶早期为杆状形貌,与基体存在一定稳定共格关系. 当挤压比λ=14时,动态再结晶晶粒数量增多,亚晶粒分布较均匀,尺寸基本上在1 μm左右(见图8(b1));颗粒状的W相在挤压过程中得到部分破碎,并沿挤压方向弥散分布,尺寸为0.2~0.4 μm(见图8(b2));部分W相在亚晶界分布,对晶粒的合并起阻碍作用(见图8(b3));当挤压比λ......
diffraction and by 1 H and 51 V NMR [J]. J Solid State Chem, 1983, 46(3): 306-312. [4] AKIBA E, IBA H. Hydrogen absorption by Laves phase related BCC solid solution [J]. Intermetallics, 1998, 6(6......
Ceramics, 2010, 49(7-8): 454-459. [6] XIAO Ping-an, QU Xuan-hui, LEI Chang-ming, ZHU Bao-jun, QIN Ming-li, AO Hui, HUANG Pei-yun. High temperature oxidation behaviors of Ti-Cr alloys with Laves phase TiCr2......
acknowledged that both β1′ and β2′ are Laves phase MgZn2 with a hexagonal structure (a=0.520 nm, c=0.857 nm) [9,10]; however, in several up-to-date literatures it is found that β1′ phase is Mg4Zn7 with a base......
, 2010, 20(8): 1447-1454. [13] LIU Y, YUAN G Y, DING W J, LU C. Deformation behavior of Mg-Zn-Gd-based alloys reinforced with quasicrystal and laves phases at elevated temperatures[J]. Journal......
×10-13.说明当凝固过程冷却速度较低时,GH4169合金由于元素的微观偏析使得凝固前沿糊状区的稳定性降低,可能会导致由微观偏析向宏观偏析的转变.图8所示为对宝钢实际生产中大尺寸(直径508 mm)钢锭在1/2半径处黑斑缺陷的电镜及电子探针分析结果,由于凝固过程冷却速度较低(平均冷却速度在0.01~0.05 ℃/s之间),产生了富Nb 的Laves相富集引起的宏观偏析缺陷,工程实际结果与上述规律......
): 239-244. [15] KRYPYAKEVICH P I, EVDOKIMENKO V I, ZALUTSKII I I. Hexagonal Laves phases in the alloys of magnesium with rare-earth metals[J]. Reports of the Academy of Sciences of the Ukrainian SSR......
构成,树枝晶为FCC结构的固溶体相, 枝晶间隙则由富FeCr的σ相,R相和Laves相组成.这说明目前的喷涂条件不足以影响CoCrFeNiTi0.5高熵合金组织结构的稳定性. 图1 铸态CoCrFeNiTi0.5高熵合金在喷涂前后的显微组织 Fig. 1 Microstructures of as-cast CoCrFeNiTi0.5 high entropy alloy......