标准摘要
[中文适用范围]： 本文件规定了由金属材料制成的扁平产品（板材和带材）拉伸应变硬化指数 n 的测定方法。 该方法仅对塑性范围内的应力-应变曲线连续且单调的部分有效（见 8.4）。 如果材料在加工硬化范围内具有锯齿状应力-应变曲线（显示 Portevin-Le Chatelier 效应的材料，例如 AlMg 合金），则自动确定（对数真实应力与对数真实应力的线性回归）塑性应变（见 8.7）用于给出可重复的结果。 [外文原描述]： This document specifies a method for determining the tensile strain hardening exponent n of flat products (sheet and strip) made of metallic materials. The method is valid only for that part of the stress-strain curve in the plastic range where the curve is continuous and monotonic (see 8.4). In the case of materials with a serrated stress-strain curve in the work hardening range (materials which show the Portevin-Le Chatelier effect, e.g. AlMg-alloys), the automatic determination (linear regression of the logarithm true stress vs. the logarithm true plastic strain, see 8.7) is used to give reproducible results.
英文名称Metallic materials — Sheet and strip — Determination of tensile strain hardening exponent