Mechanisms of Luders deformation in tensile tests of specimens of steel 08G2B with ultrafine ferrite-bainite structure are studied by the method of digital image correlation. The fields of displacements of εyy and εxy and their distribution over the length of a specimen are determined. Two kinds of Luders deformation differing in the behavior of the Chernov–Luders bands are detected. The results of the measurement of microhardness in Chernov–Luders bands and of the EBSD analysis are used to determine the interrelation between the strain aging effect and the variation of the characteristics of strength (σy , σr ) and ductility (δpl , δu , δ, n ) at tension.

中文翻译：

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应变时效对 08G2B 钢试样塑性应变阶段和拉伸断裂阶段的影响。第一部分 屈服平台和应变硬化阶段

采用数字图像相关法研究了超细铁素体-贝氏体组织08G2B钢试样拉伸试验中Luders变形的机理。εyy 和 εxy 的位移场及其在试样长度上的分布被确定。检测到两种不同切尔诺夫-卢德斯带行为的卢德斯变形。Chernov-Luders 带显微硬度测量结果和 EBSD 分析结果用于确定应变时效效应与强度 (σy , σr ) 和延展性 (δpl , δu , δ, n ) 处于张力状态。