Optics and Precision Engineering, Volume. 23, Issue 3, 632(2015)
Micro-forming properties of Ti foil under laser indirect shock
The micro-forming experiments of Ti foils were performed under a laser driven flyer indirect shock with high strain load features to overcome the micro-forming problems of difficult deformed materials.The forming properties of Ti foils under the laser indirect shock were explored from three aspects,the integrity of flyer,the fitability and the ratio of thickness to thinning of workpieces.In this experiment,the mold was fabricated by micro Electrical Discharge Machining(micro-EDM) and curved surface grinding.AISI 1090 die steel was used as the material of mold.The Ti foils with the thickness of 20 μm were employed as flyers.Furthermore,Ti foils with the thickness of 35 μm were used as workpieces.The flyers and workpieces were observed under a KEYENCE VHX-1000C digital microscope.The results indicate that the flyers show good integrity and provides a uniform shock pressure,so that the workpieces with good surface quality and fitability are fabricated.The cold-mounted technique was used to characterize the thicknesses of workpieces and to discuss the ratio of thickness to thinning,which shows that the maximum thinning rate is 19.8% and the minimum thinning rate is 2%.The results demonstrate that the workpieces have uniform thickness distribution.The laser indirect shock micro-forming technique has good forming properties on difficult deformed materials and reduces the thickness thinning effectively.
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WANG Xiao, QIU Tang-biao, GU Yu-xuan, ZHANG Di, MA You-juan, LIU Hui-xia. Micro-forming properties of Ti foil under laser indirect shock[J]. Optics and Precision Engineering, 2015, 23(3): 632
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Received: Oct. 21, 2014
Accepted: --
Published Online: Apr. 20, 2015
The Author Email: Tang-biao QIU (18361810087@163.com)