YT01低能量多碰塑性变形研究

发布时间：2018-06-07 22:18

  本文选题：低能量多碰 + 塑性变形　； 参考：《哈尔滨工业大学学报》2017年05期

【摘要】：为研究碰撞能对金属材料多碰塑性变形的影响,在实验室用自制的凸轮机械式多碰试验机对YT01试样进行了低能量多碰试验,采用坐标网格法、SEM、金相显微镜等方法研究了不同碰撞能对试样的塑性变形率、显微组织结构的影响.实验结果表明:峰值冲击应力不变时,多冲碰撞能量越大,试样累积塑性变形量也越大;随着碰撞次数的增加,试样塑性变形率减小并趋于平缓,塑性变形终止于距冲击表面69 mm处;256 000次碰撞后,试样显微组织细化,晶粒界增多.金属材料多冲碰撞塑性变形不仅与峰值冲击碰撞应力有关,也与冲击碰撞能有关.
[Abstract]:In order to study the effect of impact energy on the plastic deformation of metal materials, the low energy multi-impact test of YT01 sample was carried out in the laboratory with a self-made Cam mechanical multi-impact tester. The effects of different impact energies on the plastic deformation rate and microstructure of the specimens were studied by means of coordinate grid method (SEM) and metallographic microscope. The experimental results show that the larger the impact energy is, the larger the cumulative plastic deformation of the specimen is, and with the increase of impact times, the plastic deformation rate of the specimen decreases and tends to be gentle. The microstructure of the specimen was refined and the grain boundary increased after the plastic deformation was terminated at a distance of 69mm from the impact surface for 256,000 collisions. The plastic deformation of metal materials due to multiple impact is not only related to the peak impact stress but also to the impact energy.
【作者单位】： 苏州大学材料与化学化工学部;苏州大学机电工程学院;
【基金】：国家自然科学基金项目(11172191) 江苏省高等职业院校国内高级访问学者计划资助项目(2015)
【分类号】：TG115.5
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本文编号：1993001