Analysis of the Hardness and Elastic Modulus Distribution in a High Strength Steel Welded Joint by Nanoindentation
Nanoindentation technique was employed to study the hardness and elastic modulus for different regions in the welded joint of high strength steel. And the variation in mechanical behavior at micro scales was analyzed combined with microstructure observation. Experimental results showed that both maximum hardness (4.11GPa) and maximum elastic modulus (210.3GPa) were obtained in the coarse grained HAZ and the corresponding microstructure was granular bainite. While the weld metal and fine grained HAZ had similar values of hardness and elastic modulus, and corresponding microstructures were acicular ferrite and polygonal ferrite respectively.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
L. Y. Lan et al., "Analysis of the Hardness and Elastic Modulus Distribution in a High Strength Steel Welded Joint by Nanoindentation", Advanced Materials Research, Vols. 189-193, pp. 3270-3273, 2011