Impact response of pearlitic steel dominated by ferrite/cementite interface

IF 3.4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Mechanics of Materials Pub Date : 2025-02-17 DOI:10.1016/j.mechmat.2025.105300

Jun Wang , Ziwei Ma , Gan Ding , Rong Yang , Songlin Cai , Lanhong Dai , Chunsheng Lu , Minqiang Jiang

引用次数: 0

Abstract

It is experimentally difficult to ascertain the role of ferrite/cementite interface in the impact properties and structural evolution of pearlitic steel. In this paper, we propose a solution based on molecular dynamics simulations of planar shocks of pearlitic steel. It is found that the ferrite/cementite interface reflects the part of a shock wave and facilitates the nucleation of voids and dislocations. Consequently, the disturbance and plastic wave details are added to free surface velocity−time profiles. The evolution of voids contributes to the subsequent occurrence of spallation at interface, generating a power law relationship between the tensile strain rate and spall strength with an exponent of 2.7, which differs from that of 4.0 as spallation happens in polycrystalline ferrite regions.

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实验很难确定铁素体/方解石界面在珠光体钢的冲击性能和结构演变中的作用。本文基于珠光体钢平面冲击的分子动力学模拟，提出了一种解决方案。研究发现，铁素体/方解石界面会反射部分冲击波，并促进空洞和位错的成核。因此，自由表面速度-时间曲线中增加了扰动和塑性波细节。空隙的演化有助于随后在界面上发生剥落，在拉伸应变速率和剥落强度之间产生指数为 2.7 的幂律关系，这不同于在多晶铁素体区域发生剥落时的指数 4.0。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanics of Materials 工程技术-材料科学：综合

CiteScore

7.60

自引率

5.10%

发文量

243

审稿时长

46 days

期刊介绍： Mechanics of Materials is a forum for original scientific research on the flow, fracture, and general constitutive behavior of geophysical, geotechnical and technological materials, with balanced coverage of advanced technological and natural materials, with balanced coverage of theoretical, experimental, and field investigations. Of special concern are macroscopic predictions based on microscopic models, identification of microscopic structures from limited overall macroscopic data, experimental and field results that lead to fundamental understanding of the behavior of materials, and coordinated experimental and analytical investigations that culminate in theories with predictive quality.