Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.4
Journals
Materials
Special Issues
Investigation on As-Cast Microstructure and Characteristics of Superalloys
materials-logo
Submit to Materials Review for Materials Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Investigation on As-Cast Microstructure and Characteristics of Superalloys

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 October 2023) | Viewed by 1133

Special Issue Editor

Prof. Dr. Waldemar Kwaśny

E-Mail Website
Guest Editor
Welding Department, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland
Interests: XRD analysis; PVD and CVD coatings; fractal and multifractal analysis; computer symulations
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Superalloys are widely used in aviation, aerospace and energy industries as key high-temperature structural materials with excellent strength, toughness, fatigue, creep and microstructure stability. Hot deformation and subsequent heat treatment processes guarantee the desirable microstructure–properties relationships of superalloy parts and structures. Common superalloys include nickel, iron–nickel and cobalt alloys.

This Special Issue provides an excellent opportunity to publish theoretical and experimental studies on superalloy characterization and as-cast microstructure. Any new findings related to this topic, such as those regarding solidification characteristics of superalloys, as-cast microstructure aging, as-cast structure modeling, microstructure evolution, phase formation mechanism, etc., are welcome. More specifically, this Special Issue will cover (but will not be limited to) the following basic and applied research topics:

  • Casting;
  • Ingot;
  • Ductile cast iron;
  • Porosity;
  • Shrinkage;
  • Simulation;
  • Plasticity;
  • Flow stress;
  • As-cast aging;
  • Tensile properties;
  • Phase transformation;

Prof. Dr. Waldemar Kwaśny
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • casting
  • ingot
  • ductile cast iron
  • porosity
  • shrinkage
  • simulation
  • plasticity
  • flow stress
  • as-cast ageing
  • tensile properties
  • phase transformation
  • microstructure

Published Papers (1 paper)

Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

14 pages, 132864 KiB  
Article
Effect of Withdrawal Rate on Solidification Microstructures of DD9 Single Crystal Turbine Blade
by Yanpeng Xue, Xiaoguang Wang, Jinqian Zhao, Zhenxue Shi, Shizhong Liu and Jiarong Li
Materials 2023, 16(9), 3409; https://doi.org/10.3390/ma16093409 - 27 Apr 2023
Viewed by 931
Abstract
Single crystal superalloys are widely used in the manufacturing of turbine blades for aero-engines due to their superior performance at high temperatures. The directional solidification process is a key technology for producing single crystal turbine blades with excellent properties. In the directional solidification [...] Read more.
Single crystal superalloys are widely used in the manufacturing of turbine blades for aero-engines due to their superior performance at high temperatures. The directional solidification process is a key technology for producing single crystal turbine blades with excellent properties. In the directional solidification process, withdrawal rate is one of the critical parameters for microstructure formation and will ultimately determine the blade’s properties. In this paper, the as-cast microstructures in the typical sections of a DD9 single crystal (SX) superalloy turbine blade were investigated with 3 mm/min and 5 mm/min withdrawal rates during the directional solidification process. With increased withdrawal rate, the dendrite morphologies tended to become more refined, and the secondary dendritic arms tended to be highly developed. The dendrite in the blade aerofoil section was more refined than that in the tenon section, given the same withdrawal rate. Additionally, with increasing withdrawal rates, the size and dispersity of the γ′ precipitates in the inter-dendritic (ID) regions and dendritic core (DC) tended to decrease; furthermore, the size distributions of the γ′ precipitates followed a normal distribution law. Compared with the ID regions, an almost 62% reduction in the average γ′ sizes was measured in the DC. Meanwhile, given the same withdrawal rate, at the blade’s leading edge closest to the heater, the γ′ sizes in the aerofoil section (AS) were more refined than those in the tenon section (TS). As compared with the decreasing cross-sectional areas, the increased withdrawal rates clearly brought down the γ′ sizes. The sizes of the γ–γ′ eutectics decreased with increasing withdrawal rates, with the γ–γ′ eutectics showing both lamellar and rosette shapes. Full article
(This article belongs to the Special Issue Investigation on As-Cast Microstructure and Characteristics of Superalloys)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-1
Back to TopTop