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Metallurgical and Materials Transactions A

Metallurgical and Materials Transactions A OnlineFirst articles

20-09-2020

Mechanism for Si Poisoning of Al-Ti-B Grain Refiners in Al Alloys

Al-5Ti-1B is the most widely used grain refiner for Al alloys. However, it is not effective for grain refining Al alloys containing more than 3 wt pct Si. This adverse effect of Si is referred to as Si poisoning. In spite of extensive experimental …

18-09-2020 Open Access

Characterization of Phase Transformations During Graded Thermo-Mechanical Processing of Press-Hardening Sheet Steel 22MnB5

Safety-relevant components in automobiles require materials that combine high strength with sufficient residual ductility and high-energy absorption. A graded thermo-mechanical treatment of the press-hardening steel 22MnB5 with graded …

17-09-2020

Effect of the Volume Energy Density and Heat Treatment on the Defect, Microstructure, and Hardness of L-PBF Inconel 625

In this article, we investigated the effect of the process parameters and heat treatment on the defect formation, microstructure, and hardness of Inconel 625 manufactured by the laser powder-bed fusion (L-PBF) process. Specimens were fabricated …

16-09-2020 | Communication

Formation of Refined Grain Size Less Than 5 nm and Nano-sized Undulations in the Bonding Interface Region of an Ultrasonic Spot Welded Cu/Ni Joint

The microstructure in the bonding interface region of an ultrasonic spot welded Cu/Ni joint was investigated. At the copper side near the bonding interface, all the refined grains with random orientations and high-angle grain boundaries are < 5 nm …

15-09-2020

Key Experiments and Thermodynamic Description of the Co-Nb-Ni System

Equilibrated alloys were characterized using SEM/EDX and XRD methods to identify the Co-Nb-Ni phase equilibria at 1100 °C and 900 °C. The isothermal section at 1100 °C was re-constructed and the partial phase relationships at 900 °C were further …

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About this journal

Metallurgical and Materials Transactions A focuses on the latest research in all aspects of physical metallurgy and materials science. It explores relationships among processing, structure, and properties of materials; publishes critically reviewed, original research of archival significance.

The journal address the main topics of alloy phases; transformations; transport phenomena; mechanical behavior; physical chemistry; environment; welding & joining; surface treatment; electronic, magnetic & optical material; solidification; materials processing; composite materials; biomaterials; and light metals. MMTA publishes Technical Publications, Communications, Symposia, and more.

Published with ASM International, The Materials Information Society and The Minerals, Metals & Materials Society (TMS)

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