【摘要】 本文报道在含Mo双相钢均匀变形阶段中应变硬化行为的研究结果。发现这种钢的应变硬化曲线是由应变硬化指数分别为n₁和n₂的两条直线组成的。用Ashby应变强化理论和Milieko复合材料强度理论分别解释了这两个阶段的应变硬化行为。认为这种双相钢的强度主要取决于第一阶段的应变硬化行为,而延性则主要由第二阶段的应变硬化行为所控制。对n₂值不等于ε_u的原因进行了讨论。更多还原

【Abstract】 The strain hardenig behavior of Dual-Phase Mo-containing steel in uniform deformation was studied. It was found that the hardening curve of the experimental steel in uniform deformation consists of two stages with different strain hardening exponents n₁ and n₂. This strain hardening behavior can be explained with Ashby’s works-hardening theory and Mileiko’ s strengthening theory in composite. It is shown that the strength of Dual-Phase steel depends mainly upon the strain hardening behavior in first stage, and the ductility is controlled by the strain hardening behavior in second stage. In addition, the reason that n₂ is not equal to ε_u is also discussed.更多还原