Browsing NTNU Open by Author "Pallaspuro, Sakari"
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A new method to estimate the residual stresses in additive manufacturing characterized by point heat source
Sun, Li; Ren, Xiaobo; He, Jianying; Olsen, Jim Stian; Pallaspuro, Sakari; Zhang, Zhiliang (Journal article; Peer reviewed, 2019)Residual stress in additive manufacturing (AM) is one of the key challenges in terms of structural integrity and finish quality of printed components. Estimating the residual stress distribution on additively manufactured ... -
Comparative study of deposition patterns for DED-Arc additive manufacturing of Al-4046
Köhler, Markus; Sun, Li; Hensel, Jonas; Pallaspuro, Sakari; Kömi, Jukka; Dilger, Klaus; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)Quality assurance is one of the largest challenges to the widespread adoption of metal additive manufacturing technology. Printing pattern can significantly impact the temperature distribution during manufacturing process ... -
Effects of local grain size and inclusions on the low-temperature toughness of low-carbon as-quenched martensite
Pallaspuro, Sakari; Mehtonen, Saara; Kömi, Jukka; Zhang, Zhiliang; Porter, David (Journal article; Peer reviewed, 2018)The segregation of alloying elements that occurs during the solidification of steel leads to microscale and macroscale microstructural heterogeneity that can cause anomalous mechanical behaviour. The centreline macrosegregation ... -
A multi-barrier model assisted CAFE method for predicting ductile-to-brittle transition with application to a low-carbon ultrahigh-strength steel
Li, Yang; Pallaspuro, Sakari; Ren, Xiaobo; He, Jianying; Kömi, Jukka; Zhang, Zhiliang (Peer reviewed; Journal article, 2020)The conventional micromechanical approaches today are still not able to properly predict the ductile-to-brittle transition (DBT) of steels because of their inability to consider the co-operating ductile fracture and cleavage ...