Laser Direct Energy Deposition 3D Printing of Superalloys

Preface

Overview of Additive Manufacturing

Additive manufacturing technology

The development of AM and vat photopolymerization

Metallic additive manufacturing

Other technologies of additive manufacturing

Applications of additive manufacturing

Future technologies of additive manufacturing

Summary

References

Additive Manufactured Superalloys and their Applications

Introduction

Superalloy category in additive manufacturing

Additive manufacturing superalloys: microstructure and mechanical properties

Engineering application of additive manufactured superalloys

Summary

References

Predicting 3D Temperature Field of Inconel 718 Multi-layer Deposition using Physics Informed Neural Network

Introduction

The finite element model for multi-layer DED temperature field

Multi-layer DED thermal accumulation analysis

The temperature field prediction model based on PINN

Summary

References

Off-line Processing Parameter Optimization for Excellent Inconel 718 Deposition Shaping

Introduction

The analysis of the multi-layer DED formation characteristics

Relationship between the geometric dimensions of DED forming and the temperature of the molten pool

Offline optimization strategy of Z-axis lifting capacity based on molten pool temperature change

Laser power attenuation optimization strategy based on molten pool temperature change

Scanning speed optimization strategy based on molten pool temperature change

Summary  

References

DED Process Parameter Decision-Making Model

Introduction

Experimental design

DED single-layer single-pass process parameter decision model

DED single-layer multi-channel optimal lap step matching model

Summary

References

Tailoring Laves Phase and Mechanical Properties of Directed Energy Deposited Inconel 718 Thin-Wall via a Gradient Laser Power Method

Introduction

Microstructural characteristics of as-deposited Inconel 718

A novel gradient laser power deposition method proposed and thermal cycle regulation

Microstructural regulation by a gradient laser power deposition method

Mechanical property improvement

Summary  

References

Achieving Superior Mechanical Property of Inconel 718 Thin-Wall using Gradient-Laser-Power Deposition

Introduction

Tuning Laves phases in laser additive manufactured Inconel 718 alloy

Build quality

Microstructure

Mechanical properties

Summary

References

Microstructure Characteristics and Mechanical Properties of Post Heat Treated Inconel 718 Thin-Wall

Introduction

Recent research on heat treatments for laser additive manufactured Inconel 718 alloy

Heat treatment regimens

Microstructure characterization

Microhardness

Tensile properties

Fracture morphologies

Summary

References

Ultrasonic Vibration Assisted Deposition of Inconel 718 Bulk Alloys: Microstructure, Deposition Process, and Mechanical Property

Introduction

Microstructure and mechanical properties analysis of Ultrasonic vibration-assisted deposition of Inconel 718

Mechanisms for the effect of ultrasonic vibration on microstructure and mechanical properties

Summary

References

Cracking Mechanisms and Suppression of the γ’ Strengthen Nickel-based Superalloy During Additive Manufacturing

Introduction

Cracking mechanism of γ′ strengthened superalloys

Cracking susceptibility indicators

Cracking suppression of γ’ strengthened superalloys

Summary

References

Depositing Inconel 738LC: Microstructure Characteristics and Cracking

Introduction

Microstructure characteristics

Crack formation mechanism

Summary

References

Effects of Laser Deposition Processes on Crack Sensitivity for Depositing Inconel 738LC

Introduction

Effects of laser power on crack sensitivity

Effects of scanning speed on crack sensitivity

Effects of scanning path on crack sensitivity

Effects of substrate preheating on cracks

Effects of DED atmosphere environment on crack sensitivity

Summary

References

L-DED of Hetero-Structured IN738+IN718 Alloys with Excellent Strength and Ductility

Introduction

L-DED of the layer-heterostructured IN738+IN718

Microstructure of the layer-heterostructured IN738/IN718

Mechanical properties of the LHS

Synergistic strengthening and toughening mechanism

Summary

References

Index

Biography

Prof. Xiaoqi Chen received his PhD from University of Liverpool in 1989. He is the Dean of Shien-Ming Wu School of Intelligent Engineering, South China University of Technology (SCUT). Prior to joining SCUT, he was Deputy Director of Manufacturing Futures Research Institute, Swinburne University of Technology (2019-2022); Director of Mechatronics Engineering, University of Canterbury (2006-2019); Senior Scientist, Singapore Institute of Manufacturing Technology (1992-2006). His research focuses on advanced materials processing, robotics, and autonomous systems.

Dr. Ze Chai co-supervised postgraduate research as a postdoctoral fellow during this book's preparation. He served as an Assistant Researcher at the Shanghai Institute of Applied Physics, Chinese Academy of Sciences. Currently he is Assistant Professor in the School of Aerospace Engineering and Applied Mechanics at Tongji University. His research focuses on the advanced manufacturing of high-performance materials, and physical and chemical mechanisms of multi-scale structural evolution.

Dr. Xiaoqiang Zhang received his doctoral degree from the School of Materials Science and Engineering at Shanghai Jiao Tong University. He is currently employed at the School of Materials Science and Engineering of Jiangsu University of Science and Technology. His primary research interests lie in the fields of additive manufacturing, laser cladding and welding for high-performance alloys, as well as the investigation of gradient materials and material strengthening and toughening mechanisms.