TY - JOUR
T1 - Grain size distribution measurement of Ti-6Al-4V plate using laser-ultrasonics
AU - Dong, Feng
AU - Yang, Quan
AU - Wang, Xiaocheng
AU - Krishnaswamy, Sridhar
N1 - Funding Information:
The work was supported by Beijing Natural Science Foundation [grant number 3182026]; National Natural Science Foundation of China [grant number 51604024]; The Tribology Science Fund of State Key Laboratory of Tribology [grant number SKLTKF16B11]; and Fundamental Research Funds for the Central Universities [grant number FRF-TP-17-002A2]. The laser ultrasonic experiments were performed at the Center for Smart Structures and Materials at Northwestern University, and the microstructure characterization was done at NUANCE at Northwestern University.
Publisher Copyright:
© 2018 Acoustical Society of America.
PY - 2017
Y1 - 2017
N2 - As the most widely used titanium alloy, Ti-6Al-4V has wide range of applications in aerospace industry and medical prostheses. Grain size is a significant parameter that should be controlled during material processing for the reason that it can affect the strength and toughness directly. Laser-ultrasonics is an appropriate method for in-situ measurement of the grain size and distribution during heat treatment of Ti-6Al-4V as it is a nondestructive and non-contact technique. In this study, a laser-ultrasonic system was established combining an 8 ns width pulsed laser for ultrasound generation and a two-wave mixing (TWM) interferometer for detection. Several Ti-6Al-4V samples were heat treated variously to get different grain sizes but with the same phase ratios. Attenuation rates of ultrasonic waves in the different specimens were precisely calculated using exponential fitting for various frequencies. The true value of grain size and distribution were observed via scanning electron microscopy and electron backscatter diffraction (SEM-EBSD). The frequency dependent attenuation of ultrasonic waves was obtained for various grain sizes of Ti-6Al-4V. A statistical correlation between the grain size distribution and the frequency-dependent ultrasonic attenuation was established.
AB - As the most widely used titanium alloy, Ti-6Al-4V has wide range of applications in aerospace industry and medical prostheses. Grain size is a significant parameter that should be controlled during material processing for the reason that it can affect the strength and toughness directly. Laser-ultrasonics is an appropriate method for in-situ measurement of the grain size and distribution during heat treatment of Ti-6Al-4V as it is a nondestructive and non-contact technique. In this study, a laser-ultrasonic system was established combining an 8 ns width pulsed laser for ultrasound generation and a two-wave mixing (TWM) interferometer for detection. Several Ti-6Al-4V samples were heat treated variously to get different grain sizes but with the same phase ratios. Attenuation rates of ultrasonic waves in the different specimens were precisely calculated using exponential fitting for various frequencies. The true value of grain size and distribution were observed via scanning electron microscopy and electron backscatter diffraction (SEM-EBSD). The frequency dependent attenuation of ultrasonic waves was obtained for various grain sizes of Ti-6Al-4V. A statistical correlation between the grain size distribution and the frequency-dependent ultrasonic attenuation was established.
UR - http://www.scopus.com/inward/record.url?scp=85049448315&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049448315&partnerID=8YFLogxK
U2 - 10.1121/2.0000799
DO - 10.1121/2.0000799
M3 - Conference article
AN - SCOPUS:85049448315
SN - 1939-800X
VL - 31
JO - Proceedings of Meetings on Acoustics
JF - Proceedings of Meetings on Acoustics
IS - 1
M1 - 045004
T2 - 174th Meeting of the Acoustical Society of America
Y2 - 4 December 2017 through 8 December 2017
ER -