4.7 Article

A novel macroscopic computational methodology to predict the locations and orientation of solidification-cracks: Application to pulsed laser welding

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

The Phenomena and Criteria Determining the Cracking Susceptibility of Repair Padding Welds of the Inconel 713C Nickel Alloy

Katarzyna Lyczkowska et al.

Summary: The creep-resistant casting nickel alloys used for precise element production, such as aircraft engines, can exhibit surface defects, specifically surface discontinuities. This study focused on the remelting and surfacing process of Inconel 713C alloy castings for stationary parts of aircraft engines using the Tungsten Inert Gas method. The main problem encountered was the appearance of hot microcracks, which originated from the partial melting zone and propagated to the heat affected zone. Hot-cracking criteria were determined through metallographic studies and transvarestraint tests. The results showed that the Inconel 713C alloy was prone to hot cracking within a high-temperature brittleness range of 246 degrees C, and the critical strain speed and critical strain rate for temperature drop were identified as important factors in assessing the tendency for hot cracking.

MATERIALS (2022)

Article Materials Science, Multidisciplinary

Steel-copper functionally graded material produced by twin-wire and arc additive manufacturing (T-WAAM)

Tiago A. Rodrigues et al.

Summary: A functionally graded material (FGM) part was successfully fabricated using twin-wire and arc additive manufacturing (T-WAAM) process, with retained d-ferrite found in a Cu matrix and a smooth gradient of hardness and electric conductivity along the FGM sample height. The FGM part exhibited an ultimate tensile strength of 690 MPa and an elongation at fracture of 16.6%.

MATERIALS & DESIGN (2022)

Review Metallurgy & Metallurgical Engineering

A Review on Hot Tearing of Steels

Yanru Lu et al.

Summary: Hot tearing is a common solidification defect in both continuous cast steels and foundry shaped castings, significantly impacting the final product quality. It is a complex phenomenon involving thermal, mechanical, and chemical element segregation during casting. Factors influencing hot tearing sensitivity are discussed, along with criteria, experimental methods, and validated models from previous investigations.

INTERNATIONAL JOURNAL OF METALCASTING (2022)

Article Materials Science, Multidisciplinary

The Defining Role of Micro-fissures on the Mechanical Behavior of Laser-Welded Fully Austenitic Stainless Steel

Arnab Sarkar et al.

Summary: Micro-fissures were found in laser-welded stainless steel weldments, with their relative presence decreasing with increasing weld heat input. The spatial locations and relative presence of the micro-fissures were associated with local misorientations and grain reference orientation deviation. Solidification shrinkage was identified as the origin of the micro-fissures in laser welds. Sub-size tensile specimens with digital image correlation revealed that the presence of micro-fissures was related to mechanical property degradation.

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE (2022)

Article Engineering, Industrial

Solidification cracking of a nickel alloy during high-power keyhole mode laser welding

B. Mondal et al.

Summary: This study investigates the issue of solidification cracking in nickel alloy Inconel 740H during high power laser welding through experiments, theoretical analysis, and model calculations. The cracking model is used to determine the effects of welding variables and the locations of cracks, which are verified by experiments under different welding conditions.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2022)

Article Materials Science, Multidisciplinary

Improving the ductility in laser welded joints of CoCrFeMnNi high entropy alloy to 316 stainless steel

J. P. Oliveira et al.

Summary: This study investigates the improvement of joint performance between high entropy alloys and stainless steel by changing the base material condition. The microstructure evolution and mechanical performance of the welded joint are evaluated, and the composition changes across the fusion zone are considered to predict the microstructure evolution. The results provide insights into the mechanism for improving joint performance.

MATERIALS & DESIGN (2022)

Article Engineering, Manufacturing

Effect of laser pulse power on solidification cracking susceptibility in surface processing of a high carbon high chromium tool steel

Amir Moradiani et al.

Summary: In this study, high carbon, high chromium tool steels were processed using a high power laser. The results showed that increasing the laser energy can reduce the intensity of solidification cracking. However, materials processed with a preheat of 300°C exhibited the most severe crack intensity.

CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY (2022)

Article Automation & Control Systems

Numerical simulation of the influence of oxygen content on the weld pool depth during activated TIG welding

Anoop K. Unni et al.

Summary: The study investigates the influence of different oxygen contents in the weld pool on fluid flow and weld bead dimensions through numerical simulation and experiments. The research finds that there is a critical oxygen content required for complete reversal of fluid flow in the weld pool.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2021)

Article Materials Science, Multidisciplinary

Laser welding of H-phase strengthened Ni-rich NiTi-20Zr high temperature shape memory alloy

J. P. Oliveira et al.

Summary: Laser welding of a Ni-rich NiTi-20Zr high temperature shape memory alloy was successfully conducted, resulting in defect-free welds. The microstructure of the joints was altered by the weld thermal cycle, affecting hardness and mechanical properties. This study demonstrates the potential of advanced laser joining methods in these alloys.

MATERIALS & DESIGN (2021)

Review Optics

A review on the effect of laser pulse shaping on the microstructure and hot cracking behavior in the welding of alloys

Peilei Zhang et al.

Summary: This article discusses the application of pulsed laser in alloy welding, summarizes the main welding problems and prevention methods, and comprehensively analyzes the formation and growth processes of hot cracks in pulsed laser welding.

OPTICS AND LASER TECHNOLOGY (2021)

Article Thermodynamics

Physics of humping formation in laser powder bed fusion

C. Tang et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

Article Materials Science, Multidisciplinary

Elemental Effects on Weld Cracking Susceptibility in AlxCoCrCuyFeNi High-Entropy Alloy

Alexander C. Martin et al.

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE (2020)

Article Automation & Control Systems

Effect of weld travel speed on solidification cracking behavior. Part 2: testing conditions and metrics

N. Coniglio et al.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2020)

Article Materials Science, Multidisciplinary

Atomic-scale grain boundary engineering to overcome hot-cracking in additively-manufactured superalloys

Paraskevas Kontis et al.

ACTA MATERIALIA (2019)

Article Optics

Hot cracking in pulsed Nd:YAG laser welding of AA5456

Hamidreza Hekmatjou et al.

OPTICS AND LASER TECHNOLOGY (2018)

Article Thermodynamics

A three-dimensional numerical simulation model for weld characteristics analysis in fiber laser keyhole welding

Yuewei Ai et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2017)

Article Multidisciplinary Sciences

Initiation and growth kinetics of solidification cracking during welding of steel

L. Aucott et al.

SCIENTIFIC REPORTS (2017)

Article Materials Science, Multidisciplinary

Prediction of solidification cracking in pulsed laser welding of 2024 aluminum alloy

M. Sheikhi et al.

ACTA MATERIALIA (2015)

Article Materials Science, Multidisciplinary

A criterion for cracking during solidification

Sindo Kou

ACTA MATERIALIA (2015)

Article Thermodynamics

Formation and influence mechanism of keyhole-induced porosity in deep-penetration laser welding based on 3D transient modeling

Fenggui Lu et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2015)

Article Materials Science, Multidisciplinary

Effect of material properties on the laser welding mode limits

Eurico Assuncao et al.

JOURNAL OF LASER APPLICATIONS (2014)

Article Materials Science, Multidisciplinary

A complete model of keyhole and melt pool dynamics to analyze instabilities and collapse during laser welding

Mickael Courtois et al.

JOURNAL OF LASER APPLICATIONS (2014)

Article Metallurgy & Metallurgical Engineering

Hot cracking tests-an overview of present technologies and applications

Thomas Kannengiesser et al.

WELDING IN THE WORLD (2014)

Review Materials Science, Multidisciplinary

Initiation and growth mechanisms for weld solidification cracking

N. Coniglio et al.

INTERNATIONAL MATERIALS REVIEWS (2013)

Article Metallurgy & Metallurgical Engineering

A New Model for Keyhole Mode Laser Welding Using FLUENT

Sankhya Mohanty et al.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS (2012)

Article Metallurgy & Metallurgical Engineering

Numerical Simulation of Laser Surface Remelting on Unstructured Grids

Ojas Satbhai et al.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS (2012)

Article Physics, Applied

Modelling of gas jet effect on the melt pool movements during deep penetration laser welding

E. H. Amara et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2008)

Article Physics, Applied

Implementation of real-time multiple reflection and Fresnel absorption of laser beam in keyhole

Jung-Ho Cho et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2006)

Article Materials Science, Multidisciplinary

Hot tearing criteria evaluation for direct-chill casting of an Al-4.5 Pct Cu alloy

Suyitno et al.

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE (2005)

Review Materials Science, Multidisciplinary

Mechanical properties in the semi-solid state and hot tearing of aluminium alloys

DG Eskin et al.

PROGRESS IN MATERIALS SCIENCE (2004)

Article Materials Science, Multidisciplinary

Solidification and liquation cracking issues in welding

S Kou

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY (2003)

Article Materials Science, Multidisciplinary

Transport phenomena in laser surface alloying

S Sarkar et al.

JOURNAL OF MATERIALS SCIENCE (2003)

Article Materials Science, Multidisciplinary

Modeling of laser keyhole welding: Part I. Mathematical modeling, numerical methodology, role of recoil pressure, multiple reflections, and free surface evolution

H Ki et al.

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE (2002)

Article Engineering, Industrial

Development of crack-free welds in a TiAl-based alloy

MC Chaturvedi et al.

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY (2001)