Published by De Gruyter

Volume 58 Issue 12

December 2021

Issue of Practical Metallography

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Contents
Journal Overview

Publicly Available December 30, 2021

Page range: 745-804

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Editorial

Publicly Available December 30, 2021

Editorial

Page range: 747-747

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December 30, 2021

Quantitative Characterization of a Belt-cast High-Manganese Steel Microstructure

S. Preißler, M. Witte, T. Evertz

Page range: 748-762

Abstract

The description of the solidification process in casting processes with varying product thickness is characterized based on solidification structures, segregations as well as the primary and secondary microstructure. In near-net-shape casting processes, it is particularly challenging to achieve microstructure homogeneity in the as-cast condition, since the degree of forming in production processes up to hot or cold strip is lower than in the production of slabs or thin slabs. The density of shrinkage porosity in belt-cast high-manganese steel (HMnS) will be determined quantitatively using polished microsections. Following the visualization of the primary cast structure, light microscopic images will be obtained using different tint etches. For the evaluation of secondary dendrite arm spacing (SDAS), internally developed software based on ImageJ and Matlab will be used.

December 30, 2021

Effect of Short Solution Heat Treatment Time on the Microstructure and Properties of Al-Si-Mg-Cu Alloys

P. Zhuang, H. Shi, Z. Zhang, R. Chai, J. Zan, X. Du

Page range: 763-780

Abstract

In this work, a solution heat treatment of Al-Si-Mg-Cu casting alloy was analyzed. A new short solution heat treatment (SHT) with only 60 min has been allowed. The results revealed that this short SHT enables the improvement of the dendritic structure and the spheroidization of the eutectic silicon particles. Furthermore, the alloy showed improved mechanical properties when compared to the same alloy subjected to a longer SHT of 4 h. It was observed that increasing the SHT temperature can accelerate the dissolution and homogenization of the silicon particles and intermetallic precipitates in the matrix.

Failure analysis

December 30, 2021

Metallurgical Failure Investigation of Combustion Chamber Leakage in a Heavy-duty Gas Turbine Engine

A. Neidel, T. Gädicke, S. Riesenbeck, S. Wallich

Page range: 781-792

Abstract

In this contribution, a case study is presented describing the failure of a combustion chamber assembly in a non-OEM (Original Equipment Manufacturer) gas turbine engine used for power generation. It showed how even advanced fabrication methods, such as Electron Beam (EB) welding, could trigger fatigue fracture, even if there are no material defects, no weld imperfections, no fabrication flaws, and even if everything is within specified limits. As is so often the case in component failures, the fact that failures occur anyway, despite the absence of out-of-spec material properties, and even though there were no fabrication flaws, is attributable to the design; which is often not sturdy enough to withstand unexpected dynamic loading.

Picture of the Month

December 30, 2021

Picture of the Month

Page range: 793-793

People

Publicly Available December 30, 2021

Interview with Magdalena Speicher and Rudi Scheck

Laureates of the DGM Metallography Award 2021

Magdalena Speicher, Rudi Scheck

Page range: 794-798

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PM-News

December 30, 2021

An end to Combustion Motors: Know-how for better Batteries

Page range: 799-802

Meeting Diary

December 30, 2021

Meeting Diary

Page range: 803-803

About this journal

Practical Metallography is a bilingual (German-English) journal that informs you thoroughly on materialographic preparation, imaging and analysis of microstructures. The journal covers the development and improvement of metallographic methods and equipment, possibilities of optical and electron microscopy, spectroscopy, diffraction techniques, non-destructive testing, metallographic investigations of materials, problems of specimens preparation and evaluation including useful laboratory advice and recipes, failure analysis including damage detection and elimination.
All articles are subject to thorough, independent peer review.
Practical Metallography works closely with Deutsche Gesellschaft für Materialkunde e.V. (DGM)

Volume 58 Issue 12

Issue of Practical Metallography

Contents

Editorial

Quantitative Characterization of a Belt-cast High-Manganese Steel Microstructure

Abstract

Effect of Short Solution Heat Treatment Time on the Microstructure and Properties of Al-Si-Mg-Cu Alloys

Abstract

Metallurgical Failure Investigation of Combustion Chamber Leakage in a Heavy-duty Gas Turbine Engine

Abstract

Picture of the Month

Interview with Magdalena Speicher and Rudi Scheck

Laureates of the DGM Metallography Award 2021

An end to Combustion Motors: Know-how for better Batteries

Meeting Diary