Next Article in Journal
Change of Data-Driven Drug Design Trends Through Patent Analysis
Next Article in Special Issue
Principal Component Analysis of Blast Furnace Drainage Patterns
Previous Article in Journal
Optimal Nonlinear Adaptive Control for Voltage Source Converters via Memetic Salp Swarm Algorithm: Design and Hardware Implementation
Previous Article in Special Issue
Experimental Study on Precipitation Behavior of Spinels in Stainless Steel-Making Slag under Heating Treatment
Open AccessArticle

Flow Behavior and Hot Processing Map of GH4698 for Isothermal Compression Process

1
School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China
2
School of Materials Science and Engineering, Huazhong University of Science and Technology, and State Key Laboratory of Materials Processing and Die & Mould Technology, Wuhan 430074, China
*
Authors to whom correspondence should be addressed.
Processes 2019, 7(8), 491; https://doi.org/10.3390/pr7080491
Received: 1 July 2019 / Revised: 28 July 2019 / Accepted: 29 July 2019 / Published: 1 August 2019
(This article belongs to the Special Issue Process Modeling in Pyrometallurgical Engineering)
  |  
PDF [4862 KB, uploaded 8 August 2019]
  |  

Abstract

An in-depth understanding of the flow behaviors of materials deformed at high temperatures is of paramount significance. However, insufficient research on the nickel-based GH4698 alloy has resulted in inaccurate material flow prediction or even cracking in the practical billet opening of GH4698 large forgings. In this study, hot compressions were performed at 950–1150 °C and 0.001–3 s−1. Single-peaked strain-stress curves were obtained under various conditions, owing to dislocation motions in dynamic recrystallizations. The Arrhenius model was formulated to accurately describe the flow stress evolutions and the mean prediction error of the flow stress was 5.90%. Processing maps were constructed at various hot working conditions. It was found that the hot working ability of GH4698 markedly decreased under lower temperatures (950–1080 °C) and higher strain rates (0.1–3 s−1). Optimal thermal processing parameters were suggested. In sum, this study systematically investigated the flow behaviors and hot working ability of GH4698 in isothermal compressions. View Full-Text
Keywords: processing maps; nickel-based alloy; flow behavior; arrhenius equation processing maps; nickel-based alloy; flow behavior; arrhenius equation
Figures

Figure 1

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

Share & Cite This Article

MDPI and ACS Style

Chen, R.; Xiao, H.; Wang, M.; Li, J. Flow Behavior and Hot Processing Map of GH4698 for Isothermal Compression Process. Processes 2019, 7, 491.

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]
Processes EISSN 2227-9717 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top