Damage in metal forming

AE Tekkaya, PO Bouchard, S Bruschi, CC Tasan - CIRP Annals, 2020 - Elsevier
Physical mechanisms of ductile damage in metal forming, experimental characterization
methods for damage, and models predicting the damage level in formed components are …

Experimental and FE analysis of void closure in hot rolling of stainless steel

F Faini, A Attanasio, E Ceretti - Journal of Materials Processing Technology, 2018 - Elsevier
Casting metal products are characterized by undesired void defects due to the shrinkage
occurring during the solidification of molten material. In order to deliver safe and sound …

Pre-peak acoustic emission characteristics of tight sandstone failure under true triaxial stress

J Huang, Q Hu, CZ Qin, Z Song, X Wang - Journal of Natural Gas Science …, 2022 - Elsevier
In this study, experimental investigations were conducted on low-porosity sandstone
specimens to reveal their pre-peak cracking characteristics under constant mean stress (σ …

Pore closure in thick aluminum plate: From industrial hot rolling to individual pore observation

P Gravier, F Mas, A Barthelemy, E Boller… - Journal of Materials …, 2022 - Elsevier
Pores are often present in large aluminum ingots after casting. To ensure the mechanical
reliability of the final thick plates, these pores must be closed during the forming process, hot …

A modified Hansel-Spittel constitutive equation of Ti-6Al-4V during cogging process

L Niu, Q Zhang, B Wang, B Han, H Li, T Mei - Journal of Alloys and …, 2022 - Elsevier
Highlights•The isothermal compression of four typical microstructures for Ti-6Al-4V is
studied.•A modified HS CE considering the alpha/beta structure is proposed and …

A void evolution model accounting for stress triaxiality, Lode parameter and effective strain for hot metal forming

X Wang, X Dong - International Journal of Mechanical Sciences, 2020 - Elsevier
Large numbers of voids inevitably exist in the metal ingot due to non-equilibrium
solidification. Forging is an important technique to eliminate such internal defects and obtain …

A void closure model based on hydrostatic integration and the Lode parameter for additive manufacturing AlSi10Mg

L Niu, Q Zhang - Journal of Manufacturing Processes, 2022 - Elsevier
The void closure model is urgently needed for the subsequent hot forming process of
additive manufacturing (AM) products. The influence of temperature, Lode parameter, and …

Mechanisms and kinetics of pore closure in thick aluminum plate

P Gravier, F Mas, A Barthelemy, E Boller… - Journal of Materials …, 2022 - Elsevier
Interrupted in situ tests at high temperature characterized with X-ray microtomography were
employed to study porosity evolution under loading conditions representative of aluminum …

Void closure during open die forging of large size martensitic stainless-steel ingots: An experimental-analytical-numerical study

A Geisler, M Sadeghifar, JB Morin, A Loucif… - International Journal of …, 2023 - Springer
In the present research, void closure during the open die forging process of large size
AISI410 martensitic stainless-steel ingots was studied using a combination of analytical …

A porosity closure model considering stress triaxiality ratio and Lode stress parameter

Q Zhang, L Niu, Z Liang, M Cao, T Zhou - Journal of Materials Processing …, 2020 - Elsevier
The porosity closure model is urgently needed to design and optimize the metal forming
process. A high and accurate mean filed model is developed by Representative Volume …