Surface Treatment of TC4 by Micro-Beam Plasma Arc

Abstract:

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The effect of micro-beam plasma arc (MPA) surface remelting Ti alloy (Ti-6Al-4V) sheets was investigated. The results show that more satisfactory hardened layer could be acquired after MPA scanning process on TC4 titanium alloy. The composition, crystalline structure and micro-hardness in the remelted layer of TC4 were examined by OM, SEM, XRD and Vickers' micro-hardness tests, respectively. There were no micro-cracks or impurity in the treated sample after scanning by MPA. The micro-hardness of the treated samples was significantly improved as compared with the untreated substrates. X-ray diffraction results indicated that the surface remelting layer composed of phases, which was similar to the substrate. The micro-hardness of the surface was improved to 420 HV0.3 as compared to 190 HV0.3 of substrate. The increased hardness was obtained due to the micro-structural changes caused by rapid solidification owing to the self-quenching effect of the substrate after MPA remelting.

Info:

Periodical:

Advanced Materials Research (Volumes 299-300)

Edited by:

Jianzhong Wang and Jingang Qi

Pages:

679-683

DOI:

10.4028/www.scientific.net/AMR.299-300.679

Citation:

R. J. Yang and Z. D. Liu, "Surface Treatment of TC4 by Micro-Beam Plasma Arc", Advanced Materials Research, Vols. 299-300, pp. 679-683, 2011

Online since:

July 2011

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Price:

$35.00

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