基于组织的DH36钢焊缝微观应力应变模拟研究

doi:10.11896/cldb.22020166

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Abstract The influences of microstructure distribution and morphology in typical areas on the mechanical properties of the multi-layer multi-pass welds are researched in this paper, with the base material chosen DH36, steel for offshore platform structures. Experimental tests utilizing instrumented indentation systems and corresponding numerical simulations are employed to investigate different fracture properties (including crack ini-tiation and material deformation behaviors) from different microstructure characteristics of the weld zone. The results show that stress and strain concentration conditions occur in the mixture of acicular ferrite (AF) and grain boundary ferrite (GBF) due to the inconsistent elastic-plastic deformation behavior, with the stress concentration existing in the AF and the strain concentration in the GBF extending to the AF. In addition, the stripe distribution of GBF leads to a better joint strength than the network distribution.

Key words： heterogeneity of microstructure nano-indentation finite element simulation strain concentration

Published: 10 November 2023 Online: 2023-11-10

CLC number:

TG456.7

Fund:National Science Foundation of Shandong Province (ZR2019MEE108).

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	Articles by authors
	WANG Bingying
	LI Lisha
	QIN Zhi
	HUANG Peng
	ZOU Yukun
	WEN Zhigang
	GONG Baoming

Cite this article:

WANG Bingying,LI Lisha,QIN Zhi, et al. Microstress and Microstrain Simulation of DH36 Steel Weld Based on Microstructure[J]. Materials Reports, 2023, 37(21): 22020166-5.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22020166 OR http://www.mater-rep.com/EN/Y2023/V37/I21/22020166

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