A solution to the hot cracking problem for aluminium alloys manufactured by laser beam melting

Opprecht, Mathieu; Garandet, J.P.; Roux, G.; Flament, Camille; Soulier, Mathieu

doi:10.1016/j.actamat.2020.07.015

Cited by 177 publications

(39 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proportion of the FEZ relatively to the CZ is larger comparatively to what is reported other studies, see e.g. [9], [16]. This is in agreement with the results published in [32] that showed that the fraction of the FEZ can be tailored by controlling the preheating temperature.…”

Section: Hierarchical Nature Of the Microstructuresupporting

confidence: 92%

“…Different strategies have been developed to mitigate cracking, including optimizing processing parameters, modifying alloy composition or adding nanoparticles such as ZrH2 [8] or Yttrium Stabilized Zirconia (YSZ) [9] to refine the grain size. A successful attempt has been reported for the 6061-grade in [5] by preheating the substrate to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-scale microstuctural investigation of a new Al-Mn-Ni-Cu-Zr aluminium alloy processed by laser powder bed fusion

et al. 2021

View full text Add to dashboard Cite

Section: Hierarchical Nature Of the Microstructuresupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Multi-scale microstuctural investigation of a new Al-Mn-Ni-Cu-Zr aluminium alloy processed by laser powder bed fusion

et al. 2021

View full text Add to dashboard Cite

“…Exactly the same nanoparticle-modified powder batches as in DFSC were used in PBF-LB/M processes. PBF-LB/M results and parameters are given in the references [ 5 , 11 , 12 , 13 ]. Additionally, the two powder variants 7021/TiC and 7021/TiB 2 have been investigated with both methods in this work.…”

Section: Methodsmentioning

confidence: 99%

Correlation between Differential Fast Scanning Calorimetry and Additive Manufacturing Results of Aluminium Alloys

et al. 2022

View full text Add to dashboard Cite

High-strength aluminium alloy powders modified with different nanoparticles by ball milling (7075/TiC, 2024/CaB6, 6061/YSZ) have been investigated in-situ during rapid solidification by differential fast scanning calorimetry (DFSC). Solidification undercooling has been evaluated and was found to decrease with an increasing number of nanoparticles, as the particles act as nuclei for solidification. Lower solidification undercooling of individual powder particles correlates with less hot cracking and smaller grains in the material produced by powder bed fusion of metals by a laser beam (PBF-LB/M). Quantitatively, solidification undercooling less than about 10–15 K correlates with almost crack-free PBF-LB/M components and grain sizes less than about 3 µm. This correlation shall be used for future purposeful powder material design on small quantities before performing extensive PBF-LB/M studies.

show abstract

“…The cooling rates associated with AM (10 4 -10 6 K/s as reported in Ref. [10]) are considerably steeper than those related to casting, and thus, solidification defects such as porosities/hot tears/distortion are often generated in the AM process, especially when printing wrought aluminium alloys [11][12][13].…”

Section: The Casting Of Aluminium Alloysmentioning

confidence: 96%

Recent advances in hot tearing during casting of aluminium alloys

Katgerman

et al. 2021

Progress in Materials Science

134

View full text Add to dashboard Cite

Hot tearing is one of the most severe and irreversible casting defects for many metallic materials. In 2004, Eskin et al. published a review paper in which the development of hot tearing of aluminium alloys was evaluated . Sixteen years have passed and this domain has undergone considerable development. Nevertheless, an updated systematic description of this field has not been presented. Therefore, this article presents the latest research status of the hot tearing during the casting of aluminium alloys. The first part explains the hot tearing phenomenon and its occurrence mechanism. The second part presents a detailed description and analysis of the characterisation methods of the mushy zone mechanical properties and hot tearing susceptibility. The third part presents considerable data pertaining to the mushy zone behaviour, including those of the linear contraction and load behaviour during solidification, semi-solid strength and ductility, and characteristic points related to hot tearing. The fourth part examines the effect of the composition and casting process parameters on the hot tearing susceptibility of aluminium alloys. The fifth part describes the hot tearing simulations and the associated criteria and mechanisms. Finally, recommendations for the further development of hot tearing research are presented.

show abstract

A solution to the hot cracking problem for aluminium alloys manufactured by laser beam melting

Cited by 177 publications

References 41 publications

Multi-scale microstuctural investigation of a new Al-Mn-Ni-Cu-Zr aluminium alloy processed by laser powder bed fusion

Multi-scale microstuctural investigation of a new Al-Mn-Ni-Cu-Zr aluminium alloy processed by laser powder bed fusion

Correlation between Differential Fast Scanning Calorimetry and Additive Manufacturing Results of Aluminium Alloys

Recent advances in hot tearing during casting of aluminium alloys

Contact Info

Product

Resources

About