Next Article in Journal
Multi-Track Friction Stir Lap Welding of 2024 Aluminum Alloy: Processing, Microstructure and Mechanical Properties
Next Article in Special Issue
The Influence of Austenite Grain Size on the Mechanical Properties of Low-Alloy Steel with Boron
Previous Article in Journal
Effects of Multi-Phase Reinforcements on Microstructures, Mechanical and Tribological Properties of Cu/Ti3SiC2/C/BN/GNPs Nanocomposites Sintered by Vacuum Hot-Pressing and Hot Isostatic Pressing
Previous Article in Special Issue
Superior Strength of Austenitic Steel Produced by Combined Processing, including Equal-Channel Angular Pressing and Rolling
Article Menu

Export Article

Open AccessArticle
Metals 2016, 6(12), 325; doi:10.3390/met6120325

The Structural Evolution and Segregation in a Dual Alloy Ingot Processed by Electroslag Remelting

1,2
,
1,2
,
1,2,3,* , 1,2
,
1,2
and
4
1
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
3
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
4
School of Metallurgy, Northeastern University, Shenyang 110004, China
*
Author to whom correspondence should be addressed.
Academic Editor: Robert Tuttle
Received: 28 November 2016 / Revised: 15 December 2016 / Accepted: 16 December 2016 / Published: 21 December 2016
(This article belongs to the Special Issue Alloy Steels)
View Full-Text   |   Download PDF [5132 KB, uploaded 21 December 2016]   |  

Abstract

The structural evolution and segregation in a dual alloy made by electroslag remelting (ESR) was investigated by various analytical techniques. The results show that the macrostructure of the ingot consists of two crystallization structures: one is a quite narrow, fine, equiaxed grain region at the edge and the other is a columnar grain region, which plays a leading role. The typical columnar structure shows no discontinuity between the CrMoV, NiCrMoV, and transition zones. The average secondary arm-spacing is coarsened from 35.3 to 49.2 μm and 61.5 μm from the bottom to the top of the ingot. The distinctive features of the structure are attributed to the different cooling conditions during the ESR process. The Ni, Cr, and C contents markedly increase in the transition zone (TZ) and show a slight increase from the bottom to the top and from the surface to the center of the ESR ingot due to the partition ratios, gravity segregation, the thermal buoyancy flow, the solutal buoyancy flow, and the inward Lorentz force. Less dendrite segregation exists in the CrMoV zone and the transition zone due to a stronger cooling rate (11.1 and 4.5 °C/s) and lower Cr and C contents. The precipitation of carbides was observed in the ingot due to a lower solid solubility of the carbon element in the α phase. View Full-Text
Keywords: structure; segregation; electroslag remelting; dual alloy; transition zone structure; segregation; electroslag remelting; dual alloy; transition zone
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Liu, Y.; Zhang, Z.; Li, G.; Wang, Q.; Wang, L.; Li, B. The Structural Evolution and Segregation in a Dual Alloy Ingot Processed by Electroslag Remelting. Metals 2016, 6, 325.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top