Influence of strain gradients on the grain refinement during industrial scale ECAP

Influence of strain gradients on the grain refinement during industrial scale ECAP
复制标题

工业规模 ECAP 过程中应变梯度对晶粒细化的影响

DOI:
10.1002/mawe.201100839
复制
发表时间:
2011
影响因子:
1.1
通讯作者:
T. Lampke
T. Lampke
中科院分区:
材料科学4区
文献类型:
--
作者:
P. Frint;M. Hockauf;D. Dietrich;T. Halle;M.F.-X. Wagner;T. Lampke

文献摘要

参考文献

被引文献

相似文献

研究了6060铝合金在工业规模(横截面50×50 mm2)等通道转角挤压(ECAP)后的显微组织。我们专注于在没有额外背压的情况下进行加工,以便在一次通过后形成拐角间隙并相应地形成明显的应变梯度。低电压扫描透射电子显微镜(STEM)和电子背散射衍射分析(EBSD)被用来确定平均晶粒尺寸,晶界取向差角和晶粒形状的纵横比。这些微观结构参数进行了分析,从顶部到底部的钢坯内的三个特征位置。我们的EBSD观测清楚地记录了全局应变梯度和微观结构异质性的发生。STEM分析扩展了亚微米范围内研究位置的非均匀变形信息。在良好的协议与以前的研究中,我们的研究结果提供了详细的信息如何异质诱导剪切应变影响微观结构和力学性能时,ECAP进行无背压。
The microstructure of the aluminium alloy 6060 after industrial scale (cross‐section 50×50 mm2) equal‐channel angular pressing (ECAP) is studied. We focus on processing without additional backpressure in order to allow the formation of a corner gap and the corresponding development of a distinct strain gradient after one pass. Low voltage scanning transmission electron microscopy (STEM) and electron backscatter diffraction analysis (EBSD) are used to determine the average grain size, grain boundary misorientation angles and grain shape aspect ratios. These microstructural parameters are analysed for three characteristic locations from top to bottom within the billet. Our EBSD observations clearly document the occurrence of global strain gradients and microstructural heterogeneity. The STEM analyses expand the information on this heterogeneous deformation for the investigated locations in the sub‐micrometer range. In good agreement with previous studies, our results provide detailed information on how a heterogeneous induced shear strain affects microstructure and mechanical properties when ECAP is performed without backpressure.
DOI: 10.1002/mawe.201000670
发表时间: 2010
影响因子: 1.1
作者:
Philipp Frint;T. Halle;M. Wagner;M. Hockauf;T. Lampke
通讯作者: T. Lampke
DOI: 10.4028/www.scientific.net/msf.584-586.988
发表时间: 2008-06
期刊: Materials Science Forum
影响因子: --
作者:
B. Wielage;D. Nickel;T. Lampke;Gert Alisch;H. Podlesak;S. Darwich;M. Hockauf
通讯作者: B. Wielage;D. Nickel;T. Lampke;Gert Alisch;H. Podlesak;S. Darwich;M. Hockauf
DOI: 10.1007/s10853-010-4544-y
发表时间: 2010-09-01
影响因子: 4.5
作者:
Hockauf, Kristin;Meyer, Lothar W.;Halle, Thorsten
通讯作者: Halle, Thorsten
EBSD 和 STEM 和高梯度塑料版本铝合法
DOI: 10.3139/147.110111
发表时间: 2011
期刊: Practical Metallography
影响因子: --
作者:
D. Dietrich;H. Berek;A. Schulze;Ingolf Scharf;T. Lampke
通讯作者: T. Lampke
铝制法规 EN AW-6060 的 Rissfortschritts‐ und Ermüdungsverhalten 和 Nachgelagerter Wärmebehandlung
DOI: 10.1002/mawe.200900481
发表时间: 2009
影响因子: 1.1
作者:
K. Hockauf;L. W. Meyer;T. Halle;M. Hockauf
通讯作者: M. Hockauf