SO_(2)盐雾与冲击载荷交替作用下AerMet100钢损伤研究  

Damage of AerMet100 Steel under Alternating Action of SO_(2) Salt Spray and Impact Load

作　　者：肖瀚瑶 张勇 王安东 樊伟杰 XIAO Hanyao;ZHANG Yong;WANG Andong;FAN Weijie(Qingdao Campus of Naval Aviation University,Shandong Qingdao 266041,China)

机构地区：[1]海军航空大学青岛校区,山东青岛266041

出　　处：《装备环境工程》2025年第2期1-11,共11页Equipment Environmental Engineering

基　　金：山东省自然科学基金面上项目(ZR2020ME130);国家自然科学基金项目(52101392)。

摘　　要：目的研究Aer Met100超强钢(A100钢)在舰面环境下的服役性能,选用“SO_(2)盐雾改性盐雾试验方法”模拟海上舰面环境,研究SO_(2)盐雾与冲击载荷交替作用下对A100钢的损伤。方法使用分离式霍普金森压杆(SHPB)装置对腐蚀不同时间的A100钢试件进行反复冲击试验,得到A100钢应力应变曲线。比较不同腐蚀程度下A100钢试件的屈服强度与极限强度,使用体式显微镜和扫描电镜观察微观形貌变化,并通过电子背散射衍射(EBSD)对A100钢被腐蚀冲击交替作用后的微观结构进行观察,分析晶粒晶界的变化情况。结果冲击载荷作用下的A100钢在初期腐蚀速度较慢,在腐蚀试验一定时间后,屈服强度平均下降390.2 MPa,极限强度平均下降265.9 MPa,影响A100钢在装备中的服役寿命。结论SO_(2)盐雾腐蚀试验造成A100钢的强度明显下降,腐蚀对晶界的影响起主导作用,无晶界的小坑可能会导致晶界的不连续性和局部弱化。在高应变率反复冲击作用下,在一定范围内,导致晶界区域的局部强化,使A100钢在试验初期的抗腐蚀性能有所提升,但随着冲击次数逐渐增加,材料达到塑性变形极限,腐蚀反应速度重新加快。In order to study the service performance of A100 steel in the ship surface environment,the work aims to select the“salt spray-SO_(2) modified salt spray test method”to simulate the sea surface environment to explore the damage of A100 steel under the alternating action of SO_(2) salt spray and impact load.A split Hopkinson pressure bar(SHPB)device was used to carry out repeated impact tests on A100 steel specimens corroded for different time,and the stress-strain curves of A100 steel were obtained.The yield strength and ultimate strength of A100 steel under different corrosion degrees were compared,and the changes of micro-morphology were observed by body microscope and scanning electron microscope.The microstructure of A100 steel after alternating corrosion and impact was observed by EBSD,and the change of grain boundary was analyzed.The initial corrosion rate of A100 steel under impact load was slow.After a certain period of corrosion test,the yield strength de-creased obviously,and the ultimate strength decreased slightly,in which the yield strength decreased by 390.2 MPa and the ul-timate strength decreased by 265.9 MPa,affecting the service life of A100 steel in the equipment.Salt spray-SO_(2) corrosion test results in a significant decrease in the strength of A100 steel,and corrosion plays a leading role in the effect of grain boundary.Small pits without grain boundaries may lead to discontinuity and local weakening of grain boundaries.Under the repeated im-pact of high strain rate,the local strengthening of grain boundary region is caused in a certain range,and the corrosion resistance of A100 steel is improved at the initial stage of the test,but with the increase of impact times,the material reaches the plastic deformation limit and the corrosion reaction speed increases again.

关 键 词：冲击载荷 SO_(2)盐雾 舰面环境 A100钢 霍普金森压杆 屈服强度 极限强度 

分 类 号：TG172[金属学及工艺—金属表面处理]