Influence of duplex ageing on secondary α precipitates and mechanical properties of the near β-Ti alloy Ti-55531

Ren, Long‐Fei; Xiao, Wenlong; Han, Wei‐Zhong; Ma, Chaoli; Zhou, Lian

doi:10.1016/j.matchar.2018.06.025

Cited by 62 publications

(26 citation statements)

References 35 publications

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“…It is well known that, for a given chemical composition, the mechanical properties of DSSs are primarily modified by microstructural parameters, such as the phase fraction and crystallographic texture of each phase. These microstructural parameters can be regulated by the processing conditions [10][11][12][13][14][15][16][17][18]. Due to the two-phase nature of these alloys and the distinct mechanical behaviour between austenite and ferrite, some damage and failure (edge cracks) may be induced during the processing of DSS components.…”

Section: Introductionmentioning

confidence: 99%

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Besharatloo

Carpio

Cabrera

et al. 2020

Metals

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The microstructure and micromechanical properties of the constitutive phases of a particular duplex stainless steel in various processing conditions have been characterized. Hardness (H), elastic modulus (E) and H/E cartography maps were obtained by using a high-speed nanoindentation mapping technique. Small-scale H and E evolution at different processing conditions has been investigated by statistical analysis of a large number of nanoindentations (10,000 imprints per sample). Two mechanically distinct phases, ferrite (α) and austenite (γ), were deconvoluted from this dataset using Ulm and Constantinides’ method, with the remaining values assigned to a third mechanical phase linked to composite-like (containing α/γ interphase boundaries) regions. These mechanical property phase assessments were supplemented by overlaying crystallographic phase maps obtained by electron backscattered diffraction. An excellent correlation between microstructure and small-scale mechanical properties was achieved, especially when considering the ratio H/E.

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Section: Introductionmentioning

confidence: 99%

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Besharatloo

Carpio

Cabrera

et al. 2020

Metals

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“…e major stimulus for titanium to be used in various engineering fields is its high specific strength and temperature strength within a wide temperature range. Titanium and its alloys have been dominating aerospace, automotive, and marine industries [1][2][3][4]. It is an undeniable fact that the mechanical properties being exhibited by titanium and its alloys come from the microstructural arrangement.…”

Section: Introductionmentioning

confidence: 99%

“…ere are various factors that can influence or modify the microstructural arrangement of metals. is includes thermal treatments and mechanical treatments [4][5][6][7]. Titanium and its alloys are composed of three structural forms being alpha (α), beta (β), and alpha-beta (α, β).…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Mechanical Properties of a 3 mm Commercially Pure Titanium Plate (CP-Ti Grade 2)

Mpumlwana

Msomi

Fourie

2021

Journal of Engineering

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Titanium is seen as a good material for application in many fields due to its compatibility with different environments. However, it remains unclear whether what happens when this material is exposed to certain high temperatures for longer periods of time. The primary objective of this study was to investigate the effect of heat on a 3 mm commercially pure titanium grade 2 plate at a constant temperature of 900°C at different heating times. Three different heating times were employed in this study: 30 minutes for the first period, 60 minutes for the second period, and 90 minutes for the third period. All heated samples were air cooled to room temperature after each heating period. Microhardness, microstructure, tensile strength, and scanning electron microscopy (SEM) tests were performed. All the results were analyzed and compared with the parent sample. It was observed that the heating period influenced microstructural arrangement of the material. The microstructural changes affected negatively the ultimate tensile strength while percentage elongation was improved. The microhardness of the heat treated samples were firstly negatively affected which later jumped and exceeded that of the parent material.

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“…Young's modulus of these biomaterials is, however, much higher than that of the human bone (20)(21)(22)(23)(24)(25)(26)(27) [5]. In order to reduce the undesirable (SSE) stress shielding effect and the mismatch of Young's modulus, some metallic elements such as Zr, Nb, Mo, Ta have been proposed and added to titanium for new Ti(β) or near Ti(β) alloys, such as Ti5Al13Ta [6], Ti5Al5Mo5V3Cr [7,8], Ti5Al5Mo5V3Cr, Ti5Al5Mo5V3Cr1Zr [9], Ti14Zr16Nb [10], and Ti23Zr25Nb [10].…”

Section: Introductionmentioning

confidence: 99%

“…It has been indicated that the composition and heat treatment strongly influence the microstructure and mechanical properties of Ti-Mo alloys [8,9,16]. Additionally, a high cooling rate enables the production of Ti(β) phase materials for the concentration of 10% of Mo.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Processing Method on the Properties of Ti-23 at.% Mo Alloy

Sochacka

Miklaszewski

Kowalski

et al. 2019

Metals

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In this paper, binary β type Ti-23 at.% Mo alloys were obtained by arc melting as well as by mechanical alloying and powder metallurgical process with cold powder compaction and sintering or, interchangeably, hot pressing. The influence of the synthesis method on the microstructure and properties of bulk alloys were studied. The produced materials were characterized by an X-ray diffraction technique, scanning electron microscopy and chemical composition determination. Young’s modulus was evaluated with nanoindentation testing method based on the Oliver and Pharr approach. The mechanically alloyed Ti-23 at.% Mo powders, after inductively hot-pressed at 800 °C for 5 min, allowed the formation of single Ti(β) phase alloy. In this case, Young’s modulus and Vickers hardness were 127 GPa and 454 HV0.3, respectively. Among the examined materials, the porous (55%) single-phase scaffold showed the lowest indentation modulus (69.5 GPa). Analytical approach performed in this work focuses also on the surface properties. The estimation includes the corrosion resistance analyzed in the potentiodynamic test, and also some wettability properties as a contact angle, and surface free energy values measured in glycerol and diiodomethane testing fluids. Additionally, surface modification of processed material by micro-arc oxidation and electrophoretic deposition on the chosen samples was investigated. Proposed procedures led to the formation of apatite and fluorapatite layers, which influence both the corrosion resistance and surface wetting properties in comparison to unmodified samples. The realized research shows that a single-phase ultrafine-grained Ti-23 at.% Mo alloy for medical implant applications can be synthesized at a temperature lower than the transition point by the application of hot pressing of mechanically alloyed powders. The material processing, that includes starting powder preparation, bulk alloy transformation, and additional surface treatment functionalization, affect final properties by the obtained phase composition and internal structure.

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Influence of duplex ageing on secondary α precipitates and mechanical properties of the near β-Ti alloy Ti-55531

Cited by 62 publications

References 35 publications

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Novel Mechanical Characterization of Austenite and Ferrite Phases within Duplex Stainless Steel

Effect of Heat Treatment on the Mechanical Properties of a 3 mm Commercially Pure Titanium Plate (CP-Ti Grade 2)

Influence of the Processing Method on the Properties of Ti-23 at.% Mo Alloy

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