Effects of Si on the microstructure, ordering transformation and properties of the Cu60Zn40 alloy

Doostmohammadi, Hamid; Moridshahi, Hamid

doi:10.1016/j.jallcom.2015.03.228

Cited by 15 publications

(12 citation statements)

References 31 publications

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“…The addition of Sn to the brass alloy promoted the formation of β -and G-phases. Previous research showed that the hardness of the G-phase is more than that of β ', which in turn is harder than the α-phase [8,17,33]. Therefore, the formation of these phases caused the hardness of the Cu-30 wt-% Zn brass to increase.…”

Section: Grain Size and Hardnessmentioning

confidence: 97%

Effect of addition of tin on the microstructure and machinability of α-brass

Rajabi

Doostmohammadi

2018

Materials Science and Technology

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This study was aimed at developing lead-free brass alloys with the goal of substituting lead element with tin. For this purpose, lead-free alloys with tin were developed and the microstructure, hardness and machining behaviour of the Cu–30%Zn alloy was compared with Cu–30%Zn– x%Sn ( x = 1.2, 3.2, 5.4, 8, 11.4, 13.9, 17.4). The results showed that the addition of Sn to single-α phase brass led to the formation of duplex (α + β′) brass and then the formation of (β ′ + Ɣ ) brass both with increased hardness. In addition, the addition of Sn to Cu–30%Zn alloy led to the decrement of equivalent machining forces ( Fm), surface roughness and also the promotion of chip fragmentation due to the formation of the β ′ phase, which is an improvement in machinability.

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Section: Grain Size and Hardnessmentioning

confidence: 97%

Effect of addition of tin on the microstructure and machinability of α-brass

Rajabi

Doostmohammadi

2018

Materials Science and Technology

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“…The introduction of additional alloying elements may also enable the stabilisation of various primary phases (i.e., the presence of α, β or γ phases in the Cu-Zn system) at equilibrium. This effect can be expanded further through TMP, directly affecting the fracture behaviour and consequently, the chip-breaking properties and machinability performance of novel compositions [102,103]. Taha et al showed that, as the Si content increased from 0 wt.% to 1 wt.% in modern lead-free brasses (CuZn40), tool wear slightly increased as well [104].…”

Section: Eco-friendly Brasses (Pb-free)mentioning

confidence: 99%

Machinable Leaded and Eco-Friendly Brass Alloys for High Performance Manufacturing Processes: A Critical Review

Stavroulakis

Toulfatzis²,

Pantazopoulos³

et al. 2022

Metals

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The recent environmental/health and safety regulations placed restrictions of use of hazardous substances on critical manufacturing sectors and consumers’ products. Brass alloys specifically face a challenging issue concerning the elimination of lead (Pb) which has been a critical element affecting both the machinability and overall quality and efficiency of their manufacturing process. The adaptation of novel materials and processing routes in the green economy constitutes a crucial decision for competitive business and industry growth as a worldwide perspective with substantial industrial and social impact. This paper aims to review the emergent innovative and sustainable material solutions in the manufacturing industry, in line with environmental regulations, by highlighting smart alloy design practices and promoting new and innovative approaches for material selection and manufacturing process optimisation. In this review we analyse the processing, structure and machinability aspects of leaded brasses and underline the major guidelines and research methodologies required to overcome this technical challenge and further improve the mechanical properties and machinability of lead-free brass alloys. Various alloying and processing strategies were reviewed together with the most important failure types, as they were extracted from the existing industrial and technological experience, covering more than 20 years of research in this field.

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“…The development of a suitable grain and phase structure (the presence of α, β or γ phases in Cu-Zn system), through various metallurgical methods, e.g., alloying, forming, heat treating, etc. exerts a major influence on fracture behaviour and, consequently, on chip-breaking properties and machinability performance [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Machinability of Eco-Friendly Lead-Free Brass Alloys: Cutting-Force and Surface-Roughness Optimization

Toulfatzis

Pantazopoulos²,

David

et al. 2018

Metals

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The machinability in turning mode of three lead-free brass alloys, CuZn42 (CW510L), CuZn38As (CW511L) and CuZn36 (C27450) was evaluated in comparison with a reference free-cutting leaded brass CuZn39Pb3 (CW614N), as far as the quality characteristics, i.e., cutting force and surface roughness, were concerned. A design of experiments (DOE) technique, according to the Taguchi L 16 orthogonal array (OA) methodology, as well as analysis of variance (ANOVA) were employed in order to identify the critical-to-machinability parameters and to obtain their optimum values for high-performance machining. The experimental design consisted of four factors (cutting speed, depth of cut, feed rate and alloy) with four levels for each factor using the "smaller-the-better" criterion for quality characteristics' optimization. The data means and signal-to-noise (S/N) responses indicated that the depth of cut and the feed rate were the most influential factors for the cutting force and surface roughness, respectively. The optimized machining parameters for cutting force (34.59 N) and surface roughness (1.22 µm) minimization were determined. Confirmation experiments (cutting force: 39.37 N and surface roughness: 1.71 µm) seem to show that they are in close agreement to the main conclusions, thereby validating the findings of the statistical evaluation performed.

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Effects of Si on the microstructure, ordering transformation and properties of the Cu60Zn40 alloy

Cited by 15 publications

References 31 publications

Effect of addition of tin on the microstructure and machinability of α-brass

Effect of addition of tin on the microstructure and machinability of α-brass

Machinable Leaded and Eco-Friendly Brass Alloys for High Performance Manufacturing Processes: A Critical Review

Machinability of Eco-Friendly Lead-Free Brass Alloys: Cutting-Force and Surface-Roughness Optimization

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