Z.K. Li 1
,
2)
,
L.Zhou 1
,
2)
,
J.Z. Liu 1)
,
P.Z. Li 1) and W.J. Zhao 3) 1) Northwest Institute for Nonferrous Metal Research
,
Xi'an 710016
,
China 2) Xi'an Jiaotong University
,
Xi'an 710049
,
China 3) Nuclear Power Institute of China
,
Chengdu 610041
,
China M
金属学报(英文版)
he out of pile corrosion resistance of new Zirconium alloys in 500℃/10 3MPa steam has been investigated and the effect of alloying elements, Sn,Nb,Fe,Cr on the property has been analyzed. The results show that the new alloys have better corrosion resistance than Zircaloy 4. That no nodular corrosion is found during test cycles shows the nodular corrosion resistance can be dramatically improved by addition of alloying elements Nb. The Fe/Cr ratio should be properly controlled if there is Cr addition in the alloys when developing new alloys.
关键词:
zirconium alloy
,
null
,
null
,
null
Z.Q. Sheng and H. Xiao(National Key Laboratory for Nuclear Fuel and Material
,
Nuclear Power Institute of China
,
Chengdu 610041
,
China)Manuscript received in revised form 16 October 1998)
金属学报(英文版)
By means of TEM technique the orientation relationships of cementite, precipitated from islands of granular bainite during tempering, with ferrite have been objerved. By calculating the eigenvalue and eigenvector of transformation matrix, Isaichev relationship has been analyzed. The results indicate that Isaichev relationship indeed is the sum of Kungumov-Sachs relationship and Pitsch relationship, so the viempoint that the cementite with Isaichev relationship precipitates from austenite, instead of ferrite,is confirmed. Moreoven the matrix calculation shows that three reported orientation relationships among austenite, ferrite and cementite in pearlitic transformation cannot be simultaneously valid.
关键词:
orientation relationship
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null
