Xiang Wang, Jianzhong Zhou, Shu Huang, Jie Sheng, Yang Zheng. Effect of Laser Peening on Hydrogen Embrittlement Resistance of TC4 Titanium Alloys[J]. Acta Optica Sinica, 2017, 37(9): 0914006
- Acta Optica Sinica
- Vol. 37, Issue 9, 0914006 (2017)
Fig. 1. (a) Region and path of LP; (b) specimen surface after LP
Fig. 2. Schematic of electrochemical hydrogen charging
Fig. 3. Test positions of residual stress and microhardness
Fig. 4. Tensile specimen and peening scheme
Fig. 5. Surface morphology of tensile specimen after LP
Fig. 6. Test of surface residual stress
Fig. 7. Test of surface microhardness
Fig. 8. Force-displacement curves at room temperature
Fig. 9. Fracture macro-morphologies of different specimens. (a) Matrix; (b) specimen with LP and without hydrogen charging; (c) specimen without LP and hydrogen charging; (d) specimen with LP and hydrogen charging
Fig. 10. Fracture micro-morphologies of different specimens. (a) Matrix; (b) specimen with LP and without hydrogen charging;(c) specimen without LP and hydrogen charging; (d) specimen with LP and hydrogen charging
Fig. 11. Schematic of hydrogen embrittlement resistance of TC4 titanium alloys strengthened by LP. (a) Before hydrogen charging; (b) after hydrogen charging; (c) slow stretch; (d) hydrogen-induced crack nucleation
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Table 1. Chemical compositions of TC4 titanium alloys (mass fraction, %)
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Table 2. Tensile mechanical properties of specimens after different processing methods
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