![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
Often, scatter in mechanical properties of multi-pass steel weldments is qualitatively attributed to the underlying heterogeneous microstructure brought about by spatial variations of multiple thermal cycles. In this research, a method for quantitative heterogeneity calculation based on measured variations of microstructure and hardness throughout the multi-pass weld metals including various reheated regions was explored. Published data from multi-pass welds with controlled titanium additions (7–32 wt ppm) were correlated to comprehensive microstructure characterization. The scatter in 7 wt ppm Ti steel welds was larger than that of 32 wt ppm Ti steel welds. This change in scatter is correlated to spatial distributions of microstructural heterogeneity parameter, rather than the average value of heterogeneity parameter for the whole weldment.
Acknowledgements
The authors would like to thank Prof. Wei Zhang and Mr Tapasvi Lolla from The Ohio State University for in-depth discussions related to this paper, as well as, preliminary analyses of the data. The authors also thank the Editorial board and reviewers of the Science and Technology of Welding and Joining for providing valuable comments and criticism that have improved our paper substantially.
Notes
* This reheated WM region is referred as WMHAZ throughout the document for simplicity.
† Etching conditions were kept constant between No. 0 and No. 4 welds to maintain the consistency.
