高性能梯度纳米钛板的超声表面深滚压制备及组织性能研究

doi:10.3901/JME.2024.06.227

摘要/Abstract

摘要： 低的强度极大限制了工业纯钛的应用。采用超声表面深滚压(Ultrasonic severe surface rolling, USSR)制备了高强度、耐腐蚀、光洁表面的高性能纯钛板材。单次USSR加工在纯钛表面获得了厚度约1.3 mm的梯度硬化层和良好镜面效果的光洁表面；USSR试样具有梯度纳米结构表面层，即晶粒尺寸、位错和孪晶密度随深度梯度变化，最表面层晶粒细化至52.2 nm；USSR试样屈服强度和抗拉强度相比未加工试样分别提高了33.8%和10.9%，表面硬度提高了50.9%，同时保持了20.8%的断裂延伸率；USSR试样在Hank’s溶液中的钝化电流密度降低，极化电阻增大，钝化膜稳定性和钝化能力提高。USSR试样的高强度主要来源于晶界强化、位错强化、孪晶强化和异质变形诱导强化；高密度非平衡晶界和光洁表面有利于稳定钝化膜的形成，提高了纯钛钝化能力。研究结果为工业纯钛力学性能和腐蚀阻力的改善提供了新的思路。

关键词: 钛, 梯度纳米, 强度, 塑性, 耐蚀性, 表面强化

Abstract: Low strength greatly limits the application of industrial pure titanium. High-performance pure titanium plates with high strength, corrosion resistance, and smooth surface are prepared through ultrasonic severe surface rolling (USSR). The results indicate that a gradient hardening layer with a thickness of 1.3 mm and a smooth surface with a good mirror effect is obtained by the single-pass USSR process. The USSR sample has a gradient nanostructured surface layer, that is, the grain size, dislocation, and twin density change with the depth, and the grain size of the topmost surface layer is 52.2 nm. Compared with the unprocessed sample, the yield strength and tensile strength of the USSR sample increase by 33.8% and 10.9%, respectively, and the surface hardness increases by 50.9%. Meanwhile, the elongation to fracture of the USSR sample still maintains at 20.8%. Moreover, the passivation current density of pure titanium in Hank’s solution decreases and polarization resistance increases after USSR, giving rise to the improved stability of passivation film and passivation ability. The high strength of USSR sample is mainly derived from grain boundary strengthening, dislocation strengthening, twin strengthening, and hetero-deformation induced strengthening. The high-density non-equilibrium grain boundaries and smooth surface caused by the surface nanocrystalline are beneficial to the formation of stable passivation film, thus improving the passivation ability of pure titanium. The results provide a new idea for improving the mechanical properties and corrosion resistance of industrial pure titanium.

Key words: Ti, gradient nanostructure, strength, plasticity, corrosion resistance, surface strengthening

中图分类号:

TG111

韩静, 张政, 宋元明, 孙启胜, 刘志远, 孙甲鹏, 曹超, 赵继云. 高性能梯度纳米钛板的超声表面深滚压制备及组织性能研究[J]. 机械工程学报, 2024, 60(6): 227-235.

HAN Jing, ZHANG Zheng, SONG Yuanming, SUN Qisheng, LIU Zhiyuan, SUN Jiapeng, CAO Chao, ZHAO Jiyun. Preparation, Microstructure and Properties of High-performance Gradient Nanostructured Pure Ti Plate by USSR[J]. Journal of Mechanical Engineering, 2024, 60(6): 227-235.

参考文献

[1] HAZWANI M R S N，LIM L X，LOCKMAN Z，et al. Fabrication of titanium-based alloys with bioactive surface oxide layer as biomedical implants：Opportunity and challenges[J]. Transactions of Nonferrous Metals Society of China，2022，32(1)：1-44.
[2] 孙甲鹏，贾云飞，张勇，等. 强塑均衡金属材料精准设计及制备[J]. 机械工程学报，2021，57(16)：329-348，360. SUN Jiapeng，JIA Yunfei，ZHANG Yong，et al. Precise design and preparation of metals with strength-plasticity synergy[J]. Journal of Mechanical Engineering，2021，57(16)：329-348，360.
[3] CAO Yang，NI Song，LIAO Xiaozhou，et al. Structural evolutions of metallic materials processed by severe plastic deformation[J]. Materials Science and Engineering R：Reports，2018，133：1-59.
[4] VALIEV R Z，SERGUEEVA A V，MUKHERJEE A K. The effect of annealing on tensile deformation behavior of nanostructured SPD titanium[J]. Scripta Materialia，2003，49(7)：669-674.
[5] FATTAH-ALHOSSEINI M，KESHAVARZ M K，MAZAHERI Y，et al. Strengthening mechanisms of nano-grained commercial pure titanium processed by accumulative roll bonding[J]. Materials Science and Engineering A，2017，693：164-169.
[6] ZHEREBTSOV S V，DYAKONOV G S，SALEM A A，et al. Formation of nanostructures in commercial-purity titanium via cryorolling[J]. Acta Materialia，2013，61(4)：1167-1178.
[7] KO Y G，SHIN D H，PARK K，et al. An analysis of the strain hardening behavior of ultra-fine grain pure titanium[J]. Scripta Materialia，2006，54(10)：1785-1789.
[8] ZHAO Pengcheng，YUAN Guangjian，WANG Runzi，et al. Grain-refining and strengthening mechanisms of bulk ultrafine grained CP-Ti processed by L-ECAP and MDF[J]. Journal of Materials Science & Technology，2021，83：196-207.
[9] 付磊，林莉，罗云蓉，等. 梯度纳米结构材料疲劳性能研究进展[J]. 材料导报，2021，35(3)：3114-3121. FU Lei，LIN Li，LUO Yunrong，et al. Progress in fatigue properties of gradient nanostructured materials[J]. Materials Reports，2021，35(3)：3114-3121.
[10] 卢柯. 梯度纳米结构材料[J]. 金属学报，2015，51(1)：1-10. LU Ke. Gradient nanostructured materials[J]. Acta Metallurgica Sinica，2015，51(1)：1-10.
[11] 邓文君，曾俞宁，周子涵. 挤出切削制备梯度结构铝带材的新工艺及机理[J]. 机械工程学报，2022，58(5)：278-288. DENG Wenjun，ZENG Yuning，ZHOU Zihan. New process and mechanism for preparing gradient structural aluminum strip by extrusion-machining[J]. Journal of Mechanical Engineering，2022，58(5)：278-288.
[12] 聂祥樊，李应红，何卫锋，等. 航空发动机部件激光冲击强化研究进展与展望[J]. 机械工程学报，2021，57(16)：293-305. NIE Xiangfan，LI Yinghong，HE Weifeng，et al. Research progress and prospect of laser shock peening technology in aero-engine components[J]. Journal of Mechanical Engineering，2021，57(16)：293-305.
[13] WANG Ning，ZHU Jinlong，LIU Bai，et al. Influence of ultrasonic surface rolling process and shot peening on fretting fatigue performance of Ti-6Al-4V[J]. Chinese Journal of Mechanical Engineering，2021，34(6)：81-93.
[14] ZHENG Kaikui，LIN Youxi，CAI Jianguo，et al. Corrosion resistance and tribological properties of laser cladding layer of H13 die steel strengthened by ultrasonic rolling[J]. Chinese Journal of Mechanical Engineering，2022，35(1)：137.
[15] WANG Zimeng，JIA Yunfei，ZHANG Yong，et al. Achieving high strength-plasticity of nanoscale lamellar grain extracted from gradient lamellar nickel[J]. Chinese Journal of Mechanical Engineering，2022，35(1)：1-12.
[16] YIN Yanfei，XU Wei，SUN Qiaoyan，et al. Deformation and fracture behavior of commercially pure titanium with gradient nano-to-micron-grained surface layer[J]. Transactions of Nonferrous Metals Society of China，2015，25(3)：738-747.
[17] WANG Qi，REN Junqiang，WANG Yinling，et al. Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment[J]. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing，2019，754：121-128.
[18] LI Xiao，SUN Binhan，GUAN Bo，et al. Elucidating the effect of gradient structure on strengthening mechanisms and fatigue behavior of pure titanium[J]. International Journal of Fatigue，2021，146：106142.
[19] SUN Qisheng，SUN Jiapeng，HAN Jing，et al. Corrosion behavior in hydrochloric acid of pure titanium after ultrasonic severe surface rolling[J]. Metals，2022，12：1951
[20] WON J W，LEE J H，JEONG J S，et al. High strength and ductility of pure titanium via twin-structure control using cryogenic deformation[J]. Scripta Materialia，2020，178：94-98.
[21] KO Y G，SHIN D H，PARK K，et al. An analysis of the strain hardening behavior of ultra-fine grain pure titanium[J]. Scripta Materialia，2006，54(10)：1785- 1789.
[22] TENG Xuefei，JIA Yunfei，GONG Congyang，et al. Effect of ultrasonic surface deep rolling combined with oxygen boost diffusion treatment on fatigue properties of pure titanium[J]. Scientific Reports，2021，11(1)：17840.
[23] YE Yongda，LI Xiaopei，SUN Zhiyan，et al. Enhanced surface mechanical properties and microstructure evolution of commercial pure titanium under electropulsing-assisted ultrasonic surface rolling process[J]. Acta Metallurgica Sinica-English Letters，2018，31(12)：1272-1280.
[24] WU Hao，FAN Guohua. An overview of tailoring strain delocalization for strength-ductility synergy[J]. Progress in Materials Science，2020，113：100675.
[25] LU Ke. Stabilizing nanostructures in metals using grain and twin boundary architectures[J]. Nature Reviews Materials，2016，1(5)：16019.
[26] SUN J，TRIMBY P W，YAN F，et al. Grain size effect on deformation twinning propensity in ultrafine-grained hexagonal close-packed titanium[J]. Scripta Materialia，2013，69(5)：428-431.
[27] SUN Jiapeng，FANG Liang，SUN Kun，et al. Direct observation of dislocations originating from perfect twin boundaries[J]. Scripta Materialia，2011，65(6)：501-504.
[28] SUN Jiapeng，FANG Liang，MA Aibin，et al. The fracture behavior of twinned Cu nanowires：A molecular dynamics simulation[J]. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing，2015，634：86-90.
[29] ZHAO Shiteng，ZHANG Ruopeng，YU Qin，et al. Cryoforged nanotwinned titanium with ultrahigh strength and ductility[J]. Science，2021，373(6561)：1363-1368.
[30] WU X，JIANG P，CHEN L，et al. Synergetic strengthening by gradient structure[J]. Materials Research Letters，2014，2(4)：185-191.
[31] WU X，YANG M，LI R，et al. Plastic accommodation during tensile deformation of gradient structure[J]. Science China-Materials，2021，64(6)：1534-1544.
[32] CUI Yuwei，CHEN Liangyu，QIN Peng，et al. Metastable pitting corrosion behavior of laser powder bed fusion produced Ti-6Al-4V in Hank’s solution[J]. Corrosion Science，2022，203：110333.
[33] PAN Chen，LIU Li，LI Ying，et al. Passive film growth mechanism of nanocrystalline 304 stainless steel prepared by magnetron sputtering and deep rolling techniques[J]. Electrochimica Acta，2011，56(22)：7740-7748.
[34] GUPTA R K，BIRBILIS N. The influence of nanocrystalline structure and processing route on corrosion of stainless steel：A review[J]. Corrosion Science，2015，92：1-15.
[35] WANG Tiansheng，YU Jinku，DONG Bingfeng. Surface nanocrystallization induced by shot peening and its effect on corrosion resistance of 1Cr18Ni9Ti stainless steel[J]. Surface & Coatings Technology，2006，200(16)：4777-4781.