SONG Dan
,
DING Jinjun
,
WANG Yandong(Analysis and Testing Center
,
Northeastern University
,
Shenyang 110006
,
China)
金属学报(英文版)
The microstructures of Ti-14Al-21Nb and Ti-14Al-20Nb-2Mo-3.2V(wt%) alloys have been investikated by transmission electron microscopy(TEM).The phase constitution and the orientation relationship between α2and βwere identified by means of the selected area diffraction and the micro-diffraction techniques.Results show that,compared to Ti-14Al-21Nb,the alloying elements Mo and V can greatly increase the fraction of β phase and improve significantly the microstructures of Ti-14Al-20Nb-2Mo-3.2V.The ordered B2 structure is also evident in the residual βgrains of the latter alloy.
关键词:
:microstructure
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WANG Anchuan
,
YANG Ke
,
FAN Cungan
,
LI Yiyi(Institute of Metal Research
,
Chinese Academy of Sciences Shenyang 110015
,
China) Manuscript received 4 May 1995
金属学报(英文版)
In this paper,the microstructure and hydrogen embrittlement(HE) susceptibility of an Fe-Ni-Co based superalloy with different contents of trace elements,P and Mn,have been investigated.The results indicated that by lowering the contents of trace elements P and Mn,the size and distribution of γ' become more homogeneous,and the precipitation of stable phase η can be retarded to longer ageing time.As a result,the hydrogen resistant properties of the alloy are obviously improved.
关键词:
:microstructure
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