(1. 江蘇大學(xué) 機(jī)械工程學(xué)院 光子制造科學(xué)與技術(shù)省重點(diǎn)實(shí)驗(yàn)室，
鎮(zhèn)江 212013;
2. 華東理工大學(xué) 機(jī)械與動力工程學(xué)院, 上海 200237)
摘 要: 研究在Ti6Al4V合金激光沖擊成形過程中， 不同激光參數(shù)對板料彎曲角及表層硬度的影響。 結(jié)果表明： 當(dāng)激光功率密度小于3 GW/cm2時， 彎曲角隨著激光功率密度線性增加， 激光功率密度超過3 GW/cm2時， 由于表面熔化現(xiàn)象的出現(xiàn)， 彎曲角出現(xiàn)減小的趨勢； 板料彎曲角隨沖擊次數(shù)的增加也呈線性增長， 但彎曲阻力的增加使得彎曲角的增長速度逐漸減慢； 隨著激光功率密度的增加， 材料表面沖擊區(qū)的硬度增高， 表面硬化層的顯微硬度最高達(dá)HV490， 硬化層厚度約為1.0 mm。
關(guān)鍵字: Ti6Al4V鈦合金； 激光沖擊成形； 工藝參數(shù)
ZHANG Xing-quan1, LU Jin-zhong1
（1. Jiangsu Provincial Key Laboratory of Science and Technology of Photon Manufacturing, School of Mechanical Engineering, Jiangsu University,
Zhenjiang 212013, China;
2. School of Mechanical and Power Engineering,
East China University of Science and Technology, Shanghai 200237, China）
Abstract: Laser shock processing technology was employed on Ti6Al4V and the influence of laser parameters on laser-shock forming of Ti-6Al-4V alloy was investigated. The results show that the bending angle is in proportion to the laser energy density and the number of laser shocking when the laser energy density is less than 3 GW/cm2, when the energy density is larger than 3 GW/cm2, the shocked surface of Ti-6Al-4V alloy will result in melting and a uniform hardened layer with almost 1.0 mm in thickness and HV490 in hardness is obtained on the surface of Ti6Al4V alloy when the technologic parameters are selected properly in laser shock processing.
Key words: Ti6Al4V alloy; laser shock forming; technique parameters
