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首页> 外文期刊>Journal of Materials Research and Technology >Evolution of grain boundary character distributions in a cold-deformed Nickel-based superalloy during electropulsing treatment
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Evolution of grain boundary character distributions in a cold-deformed Nickel-based superalloy during electropulsing treatment

机译：电动处理过程中冷变形镍高超合金中晶界性状分布的演变

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The evolution of grain boundary character distribution in a cold-deformed nickel-based superalloy during the electropulsing treatment (EPT) was studied. The results revealed that both coherentΣ3 boundaries (Σ3c) and incoherentΣ3 boundaries (Σ3ic) were formed in the recrystallized structures mainly by growth accidents during EPT, while the fraction ofΣ3icboundaries became much lower at the higher EPT temperatures. Meanwhile, the fraction ofΣ3 boundaries increased with the increasing EPT temperatures till 850?°C, and decreased again at 900?°C. In addition, the high mobility of grain boundary during EPT could promote the formation of stacking errors at some locations of high angle grain boundaries (HAGBs), and thus promoting the nucleation of annealing twins. With the increasing EPT time, the fraction ofΣ3 boundaries increased slightly, and the unstableΣ3icboundaries were transformed into stableΣ3cboundaries, in which intersecting migrating SRX fronts were easier to be extended. On the other hand, a lot of low-ΣCSL grain boundaries were formed in the pre-deformed alloy with the strain of 0.1 during EPT, which was mainly attributed to the development of large grain-clusters. As the strain was large enough, the energy supplied by electropulsing could enable the cold-rolled alloy to effectively utilize the stored energy on the formation ofΣ3 boundaries. Besides that, the evolution ofΣ9 andΣ27 boundaries was analyzed in detail as well as the corrosion resistance of the studied alloy after different treatments.
机译：研究了在电禁忌术治疗（EPT）期间冷变形镍基超合金中晶界性状分布的演变。结果表明，在EPT期间主要通过生长事故在重结晶的结构中形成连贯的ς3边界（σ3C）和不接地ς3界（σ3IC），而在较高的ept温度下，ς3的一部分变得越来越低。同时，ς3边界的一部分随着850℃的增加而增加，并在900℃下再次降低。此外，EPT期间晶界的高迁移率可以在高角度晶界（HAGBS）的某些位置促进堆叠误差的形成，从而促进退火双胞胎的成核。随着EPT时间的增加，ς3边界的分数略微增加，并且不稳定的ς3ICBOUNDRIES转变为稳定ς3CBOUNDARIES，其中交叉迁移SRX前部更容易延长。另一方面，在EPT期间，在预变形合金中形成了大量的低ΣCSL晶界，其应变为0.1，这主要归因于大晶粒簇的发展。随着菌株足够大，通过电动供应的能量可以使冷轧合金能够有效地利用储存的能量对ς3边界的形成。除此之外，详细分析了ς9和ς27边界的演变，以及在不同治疗后研究合金的耐腐蚀性。

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