Impact of the heating rate on the annealing behavior and resulting mechanical properties of UFG HSLA steel
Impact of the heating rate on the annealing behavior and resulting mechanical properties of UFG HSLA steel
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加热速率对 UFG HSLA 钢退火行为及其力学性能的影响
DOI：
10.1016/j.msea.2017.11.018
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发表时间：
2018
期刊：
影响因子：
6.4
通讯作者：
C. Müller
中科院分区：
文献类型：
--
作者：
J. Niehuesbernd;E. Bruder;C. Müller
由于低应变硬化能力和应变局部化，严重塑性变形过程产生的超细晶(UFG)组织材料的成形性往往受到限制。最常见的方法是进行热处理以恢复成形性。然而，传统的炉热处理会导致晶粒长大和强度的显著损失。解决这一问题的一种方法是提高热处理的加热和冷却速度。研究了超高强度低合金(HSLA)钢的加热速率对组织演变和力学性能的影响。用电子背散射衍射仪(EBSD)对薄膜的微观结构和织构进行了表征。弯曲试验和单轴拉伸试验是为了深入了解与所获得的微观组织有关的力学性能，重点是应变局部化的趋势。研究表明，加热速率对退火行为有明显的影响，即连续生长和不连续生长。因此，由此产生的组织和机械性能不仅是时间和温度的函数，而且还取决于加热速度。在这种情况下，激光退火法的应用被证明是一种合适的方法来阻止剪切带形式的应变局部化，而不会牺牲通过严重塑性变形获得的UFG材料的大部分强度。
The formability of materials with ultrafine grained (UFG) microstructures produced by severe plastic deformation processes is often limited due to low strain hardening capabilities and strain localizations. Most commonly, heat treatments are used to regain the formability. However, conventional furnace heat treatments can lead to grain growth and significant losses in strength. One approach to address this issue is to increase the heating and cooling rates of the heat treatments. The present work focuses on the heating rate dependencies of the microstructure evolution and resulting mechanical properties of a UFG high strength low alloy (HSLA) steel. Electron backscatter diffraction (EBSD) measurements are used to characterize the microstructure and texture. Bending tests and uniaxial tensile tests are conducted to provide insight into the mechanical properties that are related to the obtained microstructures, with an emphasis on the tendency for strain localizations. The investigations reveal a distinct effect of the heating rate on the annealing behavior, i.e., continuous vs. discontinuous growth. Thus, resulting microstructures and mechanical properties are not only a function of time and temperature but also depend on the heating rate. In this context, the application of laser annealing is shown to be a suitable approach to impede strain localizations in the form of shear bands without sacrificing much of the strength of the UFG material obtained by severe plastic deformation.
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影响因子：
2.6
作者：
Valiev, RZ;Estrin, Y;Zhu, YT
通讯作者：
Zhu, YT
线性流分割生产的 UFG HSLA 钢型材的性能
DOI：
10.4028/www.scientific.net/msf.584-586.661
发表时间：
2008
期刊：
Materials Science Forum
影响因子：
--
作者：
E. Bruder;T. Bohn;C. Müller
通讯作者：
C. Müller
影响因子：
2.4
作者：
Taplick;Christoph;Rullmann;Groche
通讯作者：
Groche
变形织构对UFG HSLA钢热稳定性的影响
影响因子：
4.5
作者：
Bruder;Enrico
通讯作者：
Enrico
DOI：
10.1007/s11661-998-0104-3
发表时间：
1998-09-01
影响因子：
2.8
作者：
Carsley, JE;Fisher, A;Aifantis, EC
通讯作者：
Aifantis, EC