张彩碚
,
边为民
,
赖祖涵
,
宫波
金属学报
研究了含氢最为0.16,0.58,0.87,1.49wt—％的Ti—6Al—4V—H合金中出现的各种氢化物,结果表明:氢超过0.58％时,合金中已有Ti_3Al相析出,同时,随着氢含量的增加,氢化物的形态逐渐由低氢的粗板条变到高氢的窄板条,后者组织明显细化,在含氢1.49％的试样中,还观察到四方点阵的氢化物和块状氢化物,并发现孪晶氢化物,根据孪晶氢化物的电子衍射花样的特点,可以简便地判别氢化物为立方或四方结构。
关键词:
钛氢化物
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microstructure
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twin hydride
ZHANG Caibei BIAN Weimin LAI Zuhan GONG Bo Northeast University of Technology
,
Shenyang
,
China
金属学报(英文版)
The microstrueture and various hydrides precipitated in Ti-6A1-4V alloys containing hydrogen 0.16,0.58,0.87,1.49 wt-%,respectively,have been studied by means of TEM and X-ray diffraction.The Ti_3Al phase may precipitate when H over 0.58 wt-%.In the same time,the morphology of hydrides gradually changed from rugged sheets to narrow laths as H contents increased.The microstructure of highly H-doped alloys is obviously fine.A mas- sive hydride and the hydride with tetragonal lattice were observed in the specimen containing 1.49 wt-%H.The twin hydrides were found in the alloys with different H contents and the electron diffraction patterns of the twin hydrides can be served as a simple criterion for distin- guishing the cubic and tetragonal structures.
关键词:
titanium hydride
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