Precision forming of long-axis forgings with rib-web sections via billet optimization based on flow characteristics

Deng, Lei; Ren, Zhihua; Guo, Peng; Jin, Junsong; Wang, Xinyun; Li, Jianjun

doi:10.1016/j.ijlmm.2019.04.006

Cited by 4 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Characterization of the as-forged properties of forged Mg components in recent years has become T more widespread in literature. Many studies have focused on characterization of the monotonic structural properties of forged AZ80 and ZK60 Mg, in open die forgings [3][4][5] as well as for closed die forged components such as wheels [6][7][8], aerospace components [5,[8][9][10][11][12], and finally, automotive structural components [13][14][15][16][17][18][19][20][21][22][23][24]. In general, the main focus of these studies was the feasibility of achieving adequate material flow to produce the desired forged shape, whilst characterizing the resulting microstructure and quasi-static material properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermomechanical processing defects on fatigue and fracture behaviour of forged magnesium

Gryguc

Behravesh

Jahed

et al. 2020

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

The microstructural origins of premature fatigue failures were investigated on a variety of forged components manufactured from AZ80 and ZK60 magnesium, both at the test specimen level and the full-scale component level. Both stress and strain-controlled approaches were used to characterize the macroscopically defect-free forged material behaviour as well as with varying levels of defect intensities. The effect of thermomechanical processing defects due to forging of a industrially relevant full-scale component were characterized and quantified using a variety of techniques. The fracture initiation and early crack growth behaviour was deterministically traced back to a combination of various effects having both geometric and microstructural origins, including poor fusion during forging, entrainment of contaminants sub-surface, as well as other inhomogeneities in the thermomechanical processing history. At the test specimen level, the fracture behaviour under both stress and strain controlled uniaxial loading was characterized for forged AZ80 Mg and a structure-property relationship was developed. The fracture surface morphology was quantitatively assessed revealing key features which characterize the presence and severity of intrinsic forging defects. A significant degradation in fatigue performance was observed as a result of forging defects accelerating fracture initiation and early crack growth, up to 6 times reduction in life (relative to the defect free material) under constant amplitude fully reversed fatigue loading. At the full-scale component level, the fatigue and fracture behaviour under combined structural loading was also characterized for a number of ZK60 forged components with varying levels of intrinsic thermomechanical processing defects. A novel in-situ non-contact approach (utilizing Digital-Image Correlation) was used as a screening test to establish the presence of these intrinsic defects and reliably predict their effect on the final fracture behaviour in an accelerated manner compared to conventional methods.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of thermomechanical processing defects on fatigue and fracture behaviour of forged magnesium

Gryguc

Behravesh

Jahed

et al. 2020

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

show abstract

Technical review on design optimization in forging

Kitayama

2024

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Forging is a traditional and important manufacturing technology to produce various high strength products and is widely used in engineering fields such as automotive, aerospace and heavy industry. To produce highly accurate product, underfill that the material is not filled into the cavity should strongly avoided. For material saving and near-net product, flash should be minimized. To make the tool life long, it is preferable to produce product with low forging load. It is also preferable to uniformly deform the billet as much as possible for high strength product. Crack is a crucial defect and should strongly be avoided. Therefore, many requirements are taken into account in order to produce the forged product. To meet the requirements, design optimization in forging coupled with computer aided engineering (CAE) is an effective approach. This paper systematically reviews the related papers from the design optimization point of view. For the billet or die shape optimization, the papers are classified into four approaches. The process parameters optimization such as the billet temperature, the die temperature, the stroke length and the friction coefficient is conducted, and the related papers are also classified into four categories. The design variables and the objective function(s) used in the papers are clarified with the design optimization technique. The multi-stage forging including the hammer forging for producing complex product shape is also briefly reviewed. Finally, major performance indexes and the future outlook are summarized for the further development of design optimization in forging.

show abstract

Optimal design of preform shape based on EFA-FEM-GA integrated methodology

Liu

Wang

et al. 2021

Int J Mater Form

View full text Add to dashboard Cite

Precision forming of long-axis forgings with rib-web sections via billet optimization based on flow characteristics

Cited by 4 publications

References 16 publications

Effect of thermomechanical processing defects on fatigue and fracture behaviour of forged magnesium

Effect of thermomechanical processing defects on fatigue and fracture behaviour of forged magnesium

Technical review on design optimization in forging

Optimal design of preform shape based on EFA-FEM-GA integrated methodology

Contact Info

Product

Resources

About