CHAO Yaojie*,LIU Jifei,JU Min,et al.Influence of Electroless Nickel Plating Times on the Fatigue Properties of TC2 Titanium Alloy[J].Plating & Finishing,2022,(7):19-23.[doi:10.3969/j.issn.1001-3849.2022.07.004]
化学镀镍次数对TC2钛合金疲劳性能影响
- Title:
- Influence of Electroless Nickel Plating Times on the Fatigue Properties of TC2 Titanium Alloy
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为研究化学镀镍次数对钛合金疲劳性能的影响，选取 TC2 钛合金作为代表材料，采用疲劳试验机和扫描电子显微镜对其空白试样与 3 次和 5 次化学镀镍返修试样的疲劳寿命和疲劳断口形貌进行了测试分析。旋转弯曲疲劳试验结果表明：化学镀镍返修次数越多， TC2 试样在高载荷条件下的疲劳寿命越低；疲劳载荷越低，化学镀镍返修次数对 TC2 的疲劳寿命影响越小；当疲劳载荷接近疲劳极限时， 5 次以内的化学镀镍次数对疲劳极限数值无影响。疲劳断口观察结果表明：随着镀镍次数的增多，疲劳断口的疲劳源数量增多，疲劳扩展区和瞬断区形貌无差别。
- Abstract:
- ： In order to study the influence of the number of electroless nickel plating on the fatigue properties of titanium alloys ， TC2 titanium alloy was selected as the representative material. The fatigue properties of the blank specimens ， three and five electroless nickel plating rework specimens were tested with a fatigue testing machine. The fatigue fracture morphology was tested and analyzed by a scanning electron microscope. The results of the rotating bending fatigue test show that the more the number of electroless nickel plating rework ， the lower the fatigue life of the TC2 specimen under high load conditions. The lower the fatigue load ， the less the number of electroless nickel plating rework will affect the fatigue life of TC2.When the load is close to the fatigue limit ， the number of electroless nickel plating has little effect on the fatigue life value. Fatigue fracture observation results show that the number of fatigue sources of fatigue fracture increases ， with the increase of nickel plating times. There is no difference in the morphology of fatigue expansion zone and instantaneous fracture zone.
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备注/Memo
收稿日期： 2021-10-06 修回日期： 2022-03-11 作者简介： 晁耀杰（ 1988 — ），男，硕士，工程师，主要从事航空装备修理相关的技术及研究工作。 Email ： chaoyaojie@163.com 基金项目： 大连市高层次人才创新支持计划项目（ 2020RQ094 ），大连市揭榜挂帅科技攻关项目（ 2021JB12GX007 ） .