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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Tensile elongation of off-stoichiometric Fe_3Si single crystals at high temperatures
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Tensile elongation of off-stoichiometric Fe_3Si single crystals at high temperatures

机译：非化学计量比的Fe_3Si单晶在高温下的拉伸伸长率

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摘要

Off-stoichiometric Fe_3Si single crystals withcompositions of Fe-14at%Si and Fe-18at%Si were tensile testedat 973-1223K and at various strain rates in order to investigate amechanism for large elongation in coarse-grained Fe_3Sipolycrystals at elevated temperatures. Maximum elongation over150% is attained for both the single crystals. <111> slip isdominantly operative in Fe-14at%Si with B2-ordered structure,while <001> is in Fe-18at%Si with D0_3-ordered structure. Them values indicating strain rate sensitivity are between 0.33 and0.23 depending on orientation and temperature. Dynamicrecrystallization is not occurring on large uniform elongation. Thelarge 0.33 and 0.23 depending on orientation and temperature.Dynamic recrystallization is not occurringo n large uniformelongation. The large elongation in the single crystals isattributable to a large m value around 0.3, which is not necessarilyrelated to a solute-drag controlled creep mechanism, but todislocation interactions accompanied with subgrain formation.
机译：在973-1223K以及不同的应变速率下，对由Fe-14at％Si和Fe-18at％Si组成的非化学计量Fe_3Si单晶进行了拉伸测试，以研究粗晶粒Fe_3Si多晶在高温下大伸长的机理。两种单晶的最大伸长率均超过150％。 <111>滑移主要在具有B2序结构的Fe-14at％Si中起作用，而<001>在具有D0_3序结构的Fe-18at％Si中起作用。根据方向和温度，指示应变率灵敏度的m值在0.33和0.23之间。大均匀伸长率不会发生动态再结晶。较大的0.33和0.23取决于取向和温度。动态再结晶不会发生，并且大的均匀伸长率也不会发生。单晶的大伸长率可归因于0.3左右的大m值，这不一定与溶质-拖动控制的蠕变机理有关，而是与位错相互作用伴随着亚晶粒的形成有关。

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