**Preface to "Anniversary Feature Papers"**

The *Journal of Manufacturing and Materials Processing (*JMMP*)* aims to provide an international forum for the documentation and dissemination of recent, original, and significant research studies in the analysis of processes, equipment, systems, and materials related to material heat treatment, solidification, deformation, addition, removal, welding, and accretion for the industrial fabrication and production of parts, components, and products. The *JMMP* was established in 2017 and has published 14 issues and more than 300 contributions. It has been listed in the ESCI, Inspec (IET), and Scopus (Elsevier).

In celebration of the anniversary of the *Journal of Manufacturing and Materials Processing*, the Editorial Office has put together this Special Issue, which includes several representative papers that reflect the vibrant growth and dynamic trend of research in this field:

(1) Establishment of advanced and innovative manufacturing methodologies—as presented in the papers entitled "Investigation on Product and Process Fingerprints for Integrated Quality Assurance in Injection Molding of Microstructured Biochips" and "Machining Forces Due to Turning of Bimetallic Objects Made of Aluminum, Titanium, Cast Iron, and Mild/Stainless Steel";

(2) Processes to transform material properties and characteristics for subsequent manufacturing steps to be performed—as discussed in the papers of "Temperature- and Time-Dependent Mechanical Behavior of Post-Treated IN625 Alloy Processed by Laser Powder Bed Fusion" and "Finite Element Modeling of Orthogonal Machining of Brittle Materials Using an Embedded Cohesive Element Mesh";

(3) Design of equipment or the development of tooling for materials processing and manufacturing—as given in "Five-Axis Machine Tool Coordinate Metrology Evaluation Using the Ball Dome Artefact Before and After Machine Calibration" and "Flexible Abrasive Tools for the Deburring and Finishing of Holes in Superalloys";

(4) Assessment and control of process quality, efficiency, and competitiveness—as explored in the papers of "Performance Comparison of Subtractive and Additive Machine Tools for Meso-Micro Machining" and "Thermal Modeling of Temperature Distribution in Metal Additive Manufacturing Considering Effects of Build Layers, Latent Heat, and Temperature-Sensitivity of Material Properties";

(5) Capability enhancement of materials processing and manufacturing through prediction, modeling, analysis, optimization, monitoring, and control—as outlined in the deliberations of "Optimization of Laser Powder Bed Fusion Processing Using a Combination of Melt Pool Modeling and Design of Experiment Approaches: Density Control", "Discrete Element Simulation of Orthogonal Machining of Soda-Lime Glass with Seed Cracks", and "Effect of Post Treatment on the Microstructure, Surface Roughness and Residual Stress Regarding the Fatigue Strength of Selectively Laser Melted AlSi10Mg Structures".

This Special Issue shows that manufacturing and materials processing is an actively growing area in the research community. The scope and the findings of work presented in the *JMMP* have carried both palpable scientific merits and tangible application relevance. As the needs in this area continue to rise, it is expected that the interest in research will expand and the outcomes from studies will flourish in the future.

The success of the *JMMP* is attributed to all the scientific authors for their outstanding contributions. Sincere appreciation is due to the peer reviewers for their constructive comments and suggestions and also to the editorial team for their commitment in facilitating the high-efficiency and high-quality operation of the journal.

> **Steven Y. Liang** *Editor*
