Papers by Aldona Garbacz-Klempka
Materials, May 14, 2024
Bookmarks Related papers MentionsView impact
Archives of Metallurgy and Materials, Apr 11, 2020
Bookmarks Related papers MentionsView impact
Antiquity, Jan 24, 2024
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Praehistorische Zeitschrift, Sep 10, 2023
Bookmarks Related papers MentionsView impact
Archives of Metallurgy and Materials
Bookmarks Related papers MentionsView impact
Archives of Foundry Engineering
Bookmarks Related papers MentionsView impact
Materials
The foundry industry generates large amounts of waste when casting metal into sand moulds. An imp... more The foundry industry generates large amounts of waste when casting metal into sand moulds. An important issue is the activities that are related to the re-recovery of the grain matrix (the main component of the moulding sand) for realising subsequent technological cycles. This process is particularly important in the case of the expensive chromite matrix that is necessary for use in manganese steel casting. The effects of the reclamation treatments of spent alkali-phenolic binder sand were evaluated by scanning electron microscopy with EDS, analysing the chemical composition in micro areas and proving the loss of binder on the surfaces of the matrix grains. Tests were also performed using the main criteria for evaluating a reclaimed organic binder: sieve analysis and ignition loss. A thermogravimetric analysis study was performed to assess the change in the chromite character of the grain matrix under the influence of temperature. The effects of the reclamation measures were verifie...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Archives of Metallurgy and Materials
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
Praehistorische Zeitschrift
This paper will discuss the results of material science analyses of artefacts from grave no. 89 i... more This paper will discuss the results of material science analyses of artefacts from grave no. 89 in Karzec, Central Poland, that were discovered in 1959. The obtained results will be interpreted in the context of the possibility of a ‘new’ specialisation within the metallurgical workshop of the Lusatian people of the Late Bronze Age – a mouldmaker/moulder. In many terms, the grave at Karzec is a unique object for the study of Bronze Age metallurgy, as it contained not only two complete stone casting moulds but also pre-prepared raw material for the production of another mould as well as other metalworking objects. Despite this fact, it has yet to be the subject of a detailed analysis.
Bookmarks Related papers MentionsView impact
Materials
This paper presents the results of a stress analysis and fatigue life calculation of an HPDC moul... more This paper presents the results of a stress analysis and fatigue life calculation of an HPDC mould core. The calculations were performed using Abaqus and fe-safe software. The numerical model of a core cooled by a conformal channel was based on an existing and working counterpart made of additively manufactured high-strength 1.2709 maraging steel. This study shows that the conformal channel results in a lower average core temperature as compared to the temperature of the same core shape cooled by the conventional method. The course of the stress changes during the mould cycle was also determined. It was found that stresses on the core surface caused the cyclic compression and tension of the material. The necessary strength tests of 1.2709 steel produced by selective laser melting (SLM) within a temperature range of 25 to 550 °C, which were necessary to define the fatigue coefficients by the Seeger approximation method, were also carried out in this study, along with metallographic t...
Bookmarks Related papers MentionsView impact
Materials
This article presents the results of shape-dependent strength analyses in die-castings from tradi... more This article presents the results of shape-dependent strength analyses in die-castings from traditional (straight-drilled) and conformal core-cooling moulds. Cores with a traditional cooling layout were made of H13 steel using machining, and the working sections of the conformal cores were made using the selective laser melting method (SLM). Two series of casts were produced in the same mould. For Series A, the mould was fitted with traditional cooling cores, and for Series B, the same mould was fitted with conformal ones. The cast specimens were subjected to two weeks of natural ageing. The strength testing of the casts determined the levels of the destructive forces. The destructive forces in the core-cooling impact zones were approximately 28% higher in the B samples than they were in the A samples. The impact of the alloy’s porosity, density, and microstructure on the strengths of the casts was demonstrated. The alloy densities in the central (broken-off) fragments of the casts ...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Materials, 2020
In this paper, we present the results of experimental tests and numerical calculations for parts ... more In this paper, we present the results of experimental tests and numerical calculations for parts of foundry mold devices made by selective laser melting (SLM). The main aim of this research was to compare the heat conduction efficiency of the conformal and the traditional channel arrangement. The infusion spreader with a conformal channel arrangement and the test material were made with an M2 Concept Laser Cusing machine using 1.2709 steel powder. Temperature changes in the spreaders were compared between conventional and conformal cooling channels using finite element method (FEM) calculations. The position of the so-called “thermal equilibrium isotherm” was determined for both sprue spreaders, which separate the area of the mold with a constant temperature from the zone of cyclic temperature changes. The components of the sprue spreaders in a stress state caused by temperature changes during the operation of the pressure machine were determined using the FEM model. It was found th...
Bookmarks Related papers MentionsView impact
Uploads
Papers by Aldona Garbacz-Klempka
The book contains results of excavations (mostly from 1980s') and further interdisciplinary studies (run over last 2 years), presented in 22 papers in Polish with English summaries.
The versatility of this metal resulted in the supra-regional spread of some types of objects and manufacturing techniques in Central Europe, thus triggering the development of many local bronzeworking traditions. The rise of large metalworking centres indicates not only a high demand for bronze products but also the importance of trade contacts, often between distant communities.
The key issues in the interpretation of changes taking place during the Bronze Age (within general frameworks, 2600-500 BC) focus on an attempt to answer the questions of the processes behind the transmission of technical knowledge and metal objects and the dynamics of change. The most satisfying answers are provided by archaeometallurgical investigations, combining scientific experiments and multidisciplinary analysis by the cooperation between archaeologists and scientists.
The proposed session, in the widest sense, will be focused on an attempt to define the origins of traditions and networks of exchange of metalworking-related ideas, the dynamics of changes and technology transfer as well as the durability and innovativeness of metalworking solutions in the area stretching from the broadly defined Baltic region to the Carpathian Basin. This session welcomes papers that discuss:
• development of metalworking in the context of the product quality, with emphasis on the analysis of metal composition and production techniques,
• possibility of reconstructing bronze-working practices and techniques using the potential of interdisciplinary research