Creep behavior of intermetallic FeAl and FeAlCr alloys
Creep behavior of intermetallic FeAl and FeAlCr alloys
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金属间化合物 FeAl 和 FeAlCr 合金的蠕变行为
DOI：
10.1016/s0921-5093(96)10480-9
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发表时间：
1996
期刊：
影响因子：
6.4
通讯作者：
G. Frommeyer
中科院分区：
文献类型：
--
作者：
J. Jiménez;G. Frommeyer
铝含量为21.7 ~ 48 at.%的FeAl和FeAlCr系几种合金蠕变行为的研究进行了。该合金采用感应熔炼，具有粗大的等轴组织，晶粒尺寸约为500 μm。压缩试验的速率为10− 5至10− 2 s − 1，温度范围为700至1000°C，氩气保护气氛下进行，以尽量减少氧化。应力-应变数据的分析表明，在二元合金中，应力分量约为3，这表明蠕变是由位错的粘性滑移控制的。对于高于30原子%的铝含量，蠕变激活能随铝浓度变化不大，得到的值在360 - 395 kJ mol-1之间。另一方面，三元合金在高温压缩蠕变中的强度有所提高。在这种情况下观察到的应力指数为4-5，表明蠕变是由位错攀移控制的。对于含有30 at.%的合金，推导出蠕变激活能约为505 kJ mol-1。Al和10原子% CR.
A study of creep behavior of several alloys based in the FeAl and FeAlCr systems ranging in aluminium from 21.7 to 48 at.% was undertaken. The alloys were produced by induction melting and possess a coarse and equiaxial microstructure, with a grain size of about 500 μm. Compression tests at rates from 10−5to 10−2s−1were conducted at temperatures ranging from 700 to 1000°C under a protective atmosphere of argon to minimize oxidation. Analysis of the stress-strain data revealed in the binary alloys a stress component of about 3 that suggest that creep is controlled by viscous glide of dislocations. For an aluminium content above 30 at.%, the activation energy for creep does not vary very much with the aluminium concentration and values ranging from 360 to 395 kJ mol−1were obtained. On the other hand, the ternary alloys present an improvement in strength in the high temperature compressive creep. A stress exponent of 4–5 is observed in this case that suggest that creep is controlled by dislocation climb. An activation energy for creep of about 505 kJ mol−1was deduced for the alloy containing 30 at.% Al and 10 at.% Cr.
影响因子：
3.7
作者：
Whissell PD;Tohyama S;Martin LJ
通讯作者：
Martin LJ