Dislocations in nanostructured two-phase Fe30Ni20Mn20Al30.
Dislocations in nanostructured two-phase Fe30Ni20Mn20Al30.
复制标题
纳米结构两相 Fe30Ni20Mn20Al30 中的位错。
DOI：
10.1002/jemt.22162
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发表时间：
2013
影响因子：
2.5
通讯作者：
Baker,I
中科院分区：
文献类型：
--
作者：
Wu,X;Baker,I
在先前的研究中，Fe30Ni20Mn25Al25(at.%)，由50 nm宽的交替B.C.C.和B2相，经室温变形后具有a/2<；111>；Burgers矢量。发现位错在{110}和{112}滑移面上成对滑动，且在卑诗省相对分散。在B2相中，位错通过反相界连接在一起。本文分析了Fe-23Ni-21Mn-24Al和Fe-39Ni-12Mn-34Al两相合金在873K，以5×10∼4S∼1的应变速率压缩到−3%应变时，两个−5 nm宽的B2相中的位错。结果表明，滑移是由a<；100>；位错的滑移引起的。对文献的回顾表明，这些B2相之间观察到的滑移矢量的差异可能是由于成分的不同，变形温度的不同，或者两者兼而有之。技术资源。2013年，76：263-267。©2013 Wiley期刊，Inc.
In a previous study, the dislocations in Fe30Ni20Mn25Al25(at. %), which consist of 50 nm wide alternating b.c.c. and B2 phases, were shown to have a/2<111> Burgers vectors after room temperature deformation. The dislocations were found to glide in pairs on both {110} and {112} slip planes and were relatively widely separated in the b.c.c. phase, where the dislocations were uncoupled, and closely spaced in the B2 phase, where the dislocations were connected by an anti‐phase boundary. In this article, we analyze the dislocations in the two ∼5 nm‐wide B2 phases in a related two‐phase alloy Fe30Ni20Mn20Al30, with compositions Fe‐23Ni‐21Mn‐24Al and Fe‐39Ni‐12Mn‐34Al, compressed to ∼3% strain at a strain rate 5 × 10−4s−1at 873 K (the lowest temperature at which substantial plastic flow was observed). It is shown that slip occursby the glide ofa<100> dislocations. A review of the literature suggests that the differences in the observed slip vector between these B2 phases could be due to the differences in composition, differences in deformation temperature, or possibly both.Microsc. Res. Tech. 76:263–267, 2013. © 2013 Wiley Periodicals, Inc.