共搜索到19412条信息，每页显示10条信息，共1942页。用时：0小时0分0秒343毫秒
;Mechanical properties of TiAl alloy rolling sheet at room and high temperature 2.2 显微组织 铸锭冶金Ti-45Al-7Nb-0.3W合金轧制板材的显微组织如图1所示.图1(a)和1(b)所示分别为板材RD-ND面和TD-ND面的金相显微组织,图1(c)和1(d)所示分别为其对应的SEM显微组织.由图1...;Microstructures of Ti-45Al-7Nb-0.3W alloy hot-rolling sheet 2.3 织构 铸锭冶金Ti-45Al-7Nb-0.3W合金热轧板材的{001}γ极图和{100}γ极图如图2所示.由极图结果可知,Ti-45Al-7Nb-0.3W合金在热包套轧制后产生了较强的{100}立方织构,即面心四方γ晶胞的c轴平行于轧制TD方向(见图3)；图4所示为该TiAl......
......
......
......
......
个端面产生的剪切裂纹扩展到试样中部互相连接而诱发. 图1 热压缩实验流程示意图 Fig. 1 Schematic diagram of hot compressing test 图2 TiAl合金真应力-真应变曲线 Fig. 2 True stress-true strain curves of TiAl alloy at different strain rates and temperatures 图3 TiAl合金热压缩变形后宏观形貌 Fig. 3 Macrophologies of hot deformed specimens of TiAl alloy 在重度开裂程度区域,试样主要发生裂纹粗大的纵向自由表面开裂和纵向自由表面开裂和横向自由表面开裂混合的混合开裂,如图4(b)和(c)所示.产生纵向自由表面......
；组织演化 中图分类号:TG146.2 文献标志码:A Microstructure evolution of TiAl alloy sheet with different original microstructures WANG Zhen, LIU Ren-ci, LIU Dong, CUI Yu-you, YANG Rui (Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China) Abstract: The TiAl alloy blank with as-forged microstructure and post heat treatment microstructures, including near γ......
of the addition of 0.3%, 0.7%, 1.0%W (mole fraction) on the microstructure and mechanical properties of high-Nb TiAl alloy were studied. The results show that the W alloying doesn’t change the alloy solidification path, has no effect on the room temperature phase composition of high-Nb TiAl alloy. With the increase of W content, the segregation degree of Nb and Al element is enhanced......
......
织 Fig.1 0ptical micrographs of Tr50Al alloy 铲TiAl单柏组成,平均粒径大约为200 llm.通过热处理可使铸态合金中的层状组织消失,因而在均匀化后的合金中,a2相仅仅以粒状的形式存在(图1(b)中的C点),约占2%~3%(体积分数).可以认为本实验中的均匀化热处理已经非常充分. 2.2热腐蚀动力学曲线 ... kinetic curves of TiAl alloys in (Na, K) 2S04 melt at 900℃ 图3 铸态TiAI合金在900℃(Na, K) 2S04中腐蚀15 min后的表面形貌 Fig.3 Surface morphologies of as-cast TiAl alloy corroded in(Na......
