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Metals, Volume 10, Issue 9

September 2020 - 164 articles

Cover Story: Contamination stemming from powder metallurgy manufacturing is one of the most challenging issues yet to be overcome for the production of specific materials. This work aims at elucidating the evolution of the contamination level on PM-produced high entropy alloy (mechanically alloyed) powders and bulks in comparison with the ones of commercial 316L steel. A systematic characterization of powders at different times of milling and atmospheres was performed, as well as evaluation of the bulk microstructures with respect to the increase of the oxygen, nitrogen, and carbon concentrations in each alloy. The influence of process control agents was also considered. Methods to decrease contamination are also discussed in the paper. View this paper.
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Articles (164)

  • Article
  • Open Access
6 Citations
3,590 Views
17 Pages

22 September 2020

In this study, the phase transformation temperature of 15Cr12MoVWN ferritic/martensitic steel was determined by differential scanning calorimetry to provide a theoretical basis for the design of a heat treatment process. An orthogonal design experime...

  • Review
  • Open Access
57 Citations
13,849 Views
14 Pages

A Comprehensive Review on the Corrosion Pathways of Titanium Dental Implants and Their Biological Adverse Effects

  • Júlio C. M. Souza,
  • Karin Apaza-Bedoya,
  • Cesar A. M. Benfatti,
  • Filipe S. Silva and
  • Bruno Henriques

22 September 2020

The main aim of this work was to perform a comprehensive review of findings reported by previous studies on the corrosion of titanium dental implants and consequent clinical detrimental effects to the patients. Most studies were performed by in vitro...

  • Review
  • Open Access
77 Citations
11,503 Views
22 Pages

22 September 2020

Maraging steel is an engineering alloy which has been widely employed in metal additive manufacturing. This paper examines manufacturing and post-processing factors affecting the properties of maraging steel fabricated via laser powder bed fusion (L-...

  • Feature Paper
  • Review
  • Open Access
51 Citations
8,119 Views
26 Pages

21 September 2020

Porphyry copper deposits (PCDs) are some of the most important sources of copper (Cu) and molybdenum (Mo). Typically, the separation and recovery of chalcopyrite (CuFeS2) and molybdenite (MoS2), the major Cu and Mo minerals, respectively, in PCDs are...

  • Article
  • Open Access
16 Citations
4,702 Views
15 Pages

Spray Cooling Heat Transfer above Leidenfrost Temperature

  • Martin Chabicovsky,
  • Petr Kotrbacek,
  • Hana Bellerova,
  • Jan Kominek and
  • Miroslav Raudensky

21 September 2020

This study considers spray cooling starting at surface temperatures of about 1200 °C and finishing at the Leidenfrost temperature. Cooling is in the film boiling regime. The paper uses experimental techniques for the study of which spray paramete...

  • Article
  • Open Access
40 Citations
4,697 Views
15 Pages

Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity

  • Natalia Shkodich,
  • Alexey Sedegov,
  • Kirill Kuskov,
  • Sergey Busurin,
  • Yury Scheck,
  • Sergey Vadchenko and
  • Dmitry Moskovskikh

20 September 2020

For the first time, a powder of refractory body-centered cubic (bcc) HfTaTiNbZr-based high-entropy alloy (RHEA) was prepared by short-term (90 min) high-energy ball milling (HEBM) followed by spark plasma sintering (SPS) at 1300 °C for 10 min and...

  • Article
  • Open Access
12 Citations
4,299 Views
12 Pages

The Pitting Corrosion Behavior of the Austenitic Stainless Steel 308L-316L Welded Joint

  • Jinshan He,
  • Shiguang Xu,
  • Wenxin Ti,
  • Yaolei Han,
  • Jinna Mei and
  • Xitao Wang

18 September 2020

The pitting corrosion resistance of the austenitic stainless steel 308L-316L welded joint was investigated by electrochemical tests. It is found that the weld zone was the most critical for pits to initiate in the welded joint due to relatively insta...

  • Article
  • Open Access
2 Citations
2,762 Views
14 Pages

18 September 2020

A novel method for preparing titanium powder by multi-stage reduction of TiO2 was proposed. Its core is the preparation of high-quality low-valent titanium oxide. In this paper, the effect mechanism of different sample preparation pressures on the pr...

  • Article
  • Open Access
10 Citations
4,241 Views
11 Pages

Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere

  • Alejandro Fernández Muñoz,
  • José Luis Mier Buenhombre,
  • Ana Isabel García-Diez,
  • Carolina Camba Fabal and
  • Juan José Galán Díaz

18 September 2020

This work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 mont...

  • Article
  • Open Access
1 Citations
3,910 Views
13 Pages

18 September 2020

The study of co-fusion was one of the essential topics in the history of metallurgy in China. Simulation experiments were an essential concept in the study of the co-fusion steelmaking process. This paper mainly studied the simulation experiments of...

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Metals - ISSN 2075-4701