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金属学报  2026, Vol. 62 Issue (8): 1405-1416    DOI: 10.11900/0412.1961.2025.00206
  研究论文 本期目录 | 过刊浏览 |
冲击加载下60钢的动态力学响应及层裂行为
杨坤1, 郭庆伟1, 李超2, 张高龙1,3, 赵宇宏4, 侯华1()
1 太原科技大学 材料科学与工程学院 太原 030024
2 西南交通大学 材料科学与工程学院 成都 610031
3 山西神舟航天科技有限公司 晋中 030800
4 中北大学 材料科学与工程学院 太原 030051
Dynamic Mechanical Response and Spallation Behavior of 60 Steel Under Shock Loading
YANG Kun1, GUO Qingwei1, LI Chao2, ZHANG Gaolong1,3, ZHAO Yuhong4, HOU Hua1()
1 School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2 School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
3 Shanxi Shenzhou Aerospace Technology Co. Ltd. , Jinzhong 030800, China
4 School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
引用本文:

杨坤, 郭庆伟, 李超, 张高龙, 赵宇宏, 侯华. 冲击加载下60钢的动态力学响应及层裂行为[J]. 金属学报, 2026, 62(8): 1405-1416.
Kun YANG, Qingwei GUO, Chao LI, Gaolong ZHANG, Yuhong ZHAO, Hua HOU. Dynamic Mechanical Response and Spallation Behavior of 60 Steel Under Shock Loading[J]. Acta Metall Sin, 2026, 62(8): 1405-1416.

全文: PDF(3878 KB)   HTML
摘要: 

为探明60钢在冲击加载下的动态力学响应规律,并揭示其内部铁素体和珠光体组织在动态损伤演化中的作用,本工作利用一级轻气炮开展了平板撞击实验,并结合SEM和EBSD技术对回收样品进行了微观分析。自由面粒子速度曲线表明,60钢的层裂强度随峰值应力的增大呈先上升后趋于平缓的变化规律。微观损伤分析表明,材料在冲击加载下的损伤以脆性断裂为主,表现为解理裂纹的形核与扩展。随着峰值应力的提高,韧性损伤特征逐渐增强,表现为微孔洞的形核、长大和联合。晶界、渗碳体片层及铁素体/渗碳体界面是损伤的优先形核位置。在珠光体晶粒内,微裂纹倾向于沿与渗碳体片层方向呈较大角度的方向进行扩展。EBSD结果表明,晶粒取向是影响解理裂纹扩展的主要因素,微裂纹倾向于沿所在晶粒的{001}晶面扩展。

关键词 : 冲击加载,  层裂强度,  微观组织,  解理裂纹    
Abstract:

Owing to its favorable mechanical properties derived from a ferrite-pearlite dual-phase microstructure, 60 steel is widely used in load-bearing components such as bearings and transmission gears, as well as in impact-resistant structures in vehicles and ships, underscoring its potential for dynamic engineering applications. In this study, plate-impact experiments were performed using a single-stage gas gun. The shock-induced microstructural response of 60 steel was examined using SEM and EBSD. Free-surface velocity profiles indicate that spall strength initially increases with peak stress and subsequently approaches saturation. Damage morphology reveals that brittle fracture is the dominant failure mechanism, characterized by the nucleation and propagation of cleavage cracks. At higher peak stresses, ductile damage becomes increasingly evident through the nucleation, growth, and coalescence of microvoids. Grain boundaries, cementite lamellae, and ferrite-cementite interfaces serve as preferential damage-nucleation sites. Within pearlite colonies, microcracks tend to propagate along directions forming larger angles with the cementite lamellae. EBSD analysis further confirms that grain orientation governs cleavage-crack propagation, with microcracks preferentially advancing along the {001} crystallographic planes.

Key words: shock loading    spall strength    microstructure    cleavage crack
收稿日期: 2025-07-18     
ZTFLH:  TG142.1  
基金资助:国家自然科学联合基金重点项目(U23A20628);山西省基础研究计划项目(202403021222207)
通讯作者: 侯 华,houhua@nuc.edu.cn,主要从事金属材料特种成型技术及其金属模具涂层新材料制备技术的研究
Corresponding author: HOU Hua, professor, Tel: 13934153099, E-mail: houhua@nuc.edu.cn
作者简介: 杨 坤,男,1994年生,博士
图1  平板撞击实验装置示意图
No.dfdsuf
mmmmkm·s-1
Shot 11.4922.9950.205
Shot 21.5023.0080.307
Shot 31.4932.9920.534
Shot 41.5093.0070.645
表1  平板撞击实验参数
图2  初始材料的SEM及EBSD表征(a) SEM image (b) inverse pole figure (IPF) map (c) pole figure (PF)(d, e) distribution histograms of grain size for ferrite (d) and pearlite (e)
图3  波系传播的位置-时间(X-t)示意图及对应的自由面粒子速度历史
图4  自由面粒子速度历史曲线
No.σHELσHσspε˙
GPaGPaGPa105 s-1
Shot 12.253.671.570.465
Shot 22.255.621.990.556
Shot 32.2910.261.960.566
Shot 42.4512.682.220.587
表2  不同峰值应力下60钢的力学性能
图5  Q235钢[15,22]和60钢的层裂强度与峰值应力关系
图6  Shot 1回收样品的SEM像
图7  Shot 1回收样品的SEM像(a) microcracks propagating in ferrite (C1) and pearlite (C2) grains(b) microcracks propagating through (C3) and along (C4) cementite lamellae
图8  微裂纹扩展方向与渗碳体片层方向之间的夹角角度分布
图9  Shot 2回收样品的SEM像及EBSD表征(a) SEM image (b) band contrast map (c) IPF map(d) kernel average misorientation (KAM) map (Black circles mark the regions containing voids surrounded by severe plastic deformation)
图10  C6~C8裂纹(图9)的SEM像和反极图的放大图
图11  Shot 3回收样品的SEM及EBSD表征结果(a) SEM image (b) band contrast map (Arrows indicate microvoids located on twin boundaries)(c) IPF map (d) {112} and {111} PFs of the matrix and twins indicated by the black circle in Fig.11c
图12  Shot 4回收样品断口形貌的SEM像
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