| 王大伟,贾旭,侯廷红,江荣,宋迎东.电子束焊修复TC4钛合金风扇叶片抗外物冲击试验[J].航空发动机,2026,52(1):154-161 |
| 电子束焊修复TC4钛合金风扇叶片抗外物冲击试验 |
| Foreign Object Impact Resistance Test on Electron Beam Welding-Repaired TC4 Titanium Alloy FanBlades |
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| DOI：10.12482/ISSN.1672-3147.20221121002 |
| 中文关键词: 风扇叶片 外物损伤 电子束补片焊接 抗外物冲击能力 TC4钛合金 裂纹 航空发动机 |
| 英文关键词:fan blades foreign object damage electron beam patch welding resistance to foreign object impact TC4 titanium
alloy crack aero-engine |
| 基金项目:国家自然科学基金（51105198）资助 |
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| 中文摘要: |
| 为了评价电子束焊修复风扇叶片抗外物冲击能力的影响并揭示其冲击失效行为，开展了实际修复风扇叶片高速弹道冲
击试验。结果表明：在相同冲击条件下，完好叶片遭受冲击后产生沿弦向的条形片状材料损失；未经后处理修复叶片受冲击后裂
纹倾向沿焊缝扩展；热处理和喷丸强化后的修复叶片虽沿焊缝率先萌生冲击裂纹，但很快停止扩展且未出现沿焊缝的材料损失，
这是因为焊缝部位的抗冲击能力虽弱于叶片原始材料的，但热处理和喷丸强化能够改善焊缝的抗冲击能力；焊缝部位叶片减薄更
容易萌生沿焊缝扩展裂纹，使叶片抗冲击能力降低；断口分析发现，补片的冲击断口出现尺寸较大的韧窝，焊缝冲击断口表现为高
低错落的阶梯状准解理韧窝复合特征，准解理面内分布大量不均匀、尺寸较小的韧窝，进一步表明焊缝抗冲击能力低于原始叶片
材料的。 |
| 英文摘要: |
| To evaluate the effect of electron beam welding (EBW) repair on the foreign object impact resistance of fan blades and
reveal their impact failure behavior, high-speed ballistic impact tests were conducted on actually repaired fan blades. The results show
that: under the same impact conditions, the intact blades suffer from strip-shaped sheet material loss along the chord direction after impact;
the repaired blades without post-treatment tend to have cracks propagating along the weld seam after impact; although the repaired blades
after heat treatment and shot peening strengthening first initiate impact cracks along the weld seam, the cracks stop propagating quickly
and no material loss along the weld seam occurs. This is because although the impact resistance of the weld seam is weaker than that of the
original blade material, heat treatment and shot peening strengthening can improve the impact resistance of the weld seam; the thinning of
the blade at the weld seam makes it easier to initiate cracks propagating along the weld seam, thereby reducing the impact resistance of the
blade; fracture analysis reveals that the impact fracture of the patch exhibits relatively large dimples, while the impact fracture of the weld
seam shows a stepped quasi-cleavage dimple composite feature with uneven heights. A large number of uneven and small-sized dimples
are distributed on the quasi-cleavage surface, which further indicates that the impact resistance of the weld seam is lower than that of the
original blade material. |
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