Formability and deformation mechanism of Ti-6Al-4V sheet under electropulsing assisted incremental forming

Ao, Dongwei; Gao, Jun; Chu, Xiaodong; Lin, Shudai; Lin, Jianping

doi:10.1016/j.ijsolstr.2020.06.028

Cited by 29 publications

(20 citation statements)

References 16 publications

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“…Referring back to Figure 4, it appears that the coolant lubricant also functioned to balance temperature within a steady range, enabling lubricant 3 to remain effective throughout the whole high-temperature SPIF process. The surface quality of lubricant 3 is observable better than lubricant 1 and 2, and the results are comparable with the study by Ao, Gao [19], on electric heat-assisted SPIF of Ti-6Al-4V sheets which has indicated signi cant current-carrying wear, and another study by Ambrogio, Filice [4], on induction heat-assisted SPIF of Ti-6Al-4V sheets where severe adhesive wear remained.…”

Section: Surface Roughnesssupporting

confidence: 86%

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A Novel Tool to Enhance The Lubricant Efficiency On Induction Heat-Assisted Incremental Sheet Forming of Ti-6Al-4V Sheets

Essa

2022

Preprint

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For heat-assisted single point incremental sheet forming (SPIF) works of Ti-6Al-4V sheets, the use of lubricant has shown significant effects on surface quality and geometric accuracy at higher temperatures. Molybdenum disulphide (MoS2) is a common lubricant widely used in SPIF works, however, it usually indicates ineffective performance at high temperatures. This article has studied different lubricants of MoS2 lubricants and proposed a novel mixture of MoS2 to provide better surface quality and improve geometric accuracy. A forming tool with a ball-roller and water channel was designed to enable the MoS2 mixture to pass through the tool tip, allowing easy application of the lubricant on the localised area and reduce the thermal expansion on the ball-roller. Surface roughness analysis has revealed that the water-cooling MoS2 mixture performed well in reducing friction effects and achieved better geometric accuracy. Forming forces measurements, scanning electron microscope (SEM), energy dispersive X-ray Analysis (EDX) and micro-hardness tests also indicated that a higher strain hardening behaviour was detected for the water-cooling MoS2 mixture.

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Section: Surface Roughnesssupporting

confidence: 86%

“…Once the critical point is passed at Stage 3, all three lubricants tended to converge as the DRX for all experiments is fairly initiated. Studies by Ao, Gao [19] and Vahdani, Mirnia [25] also reported similar ndings for the high-temperature SPIF process of Ti-6Al-4V sheets.…”

Section: Thickness Pro Lesupporting

confidence: 63%

A Novel Tool to Enhance The Lubricant Efficiency On Induction Heat-Assisted Incremental Sheet Forming of Ti-6Al-4V Sheets

Essa

2022

Preprint

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“…Water jet incremental forming technology has also been used for the metal bellows forming process [274]. ISF has been studied by many researchers using laser [275,276], ultrasonic [98,[277][278][279], electromagnetic [280,281], and electrical heating [175,282,283], and in addition, a novel design using More studies and investigations have been published to better understand the abovementioned methods for carrying out ISF using a water jet [269][270][271][272][273] and water jet incremen-tal micro-forming with supporting dies [267]. Water jet incremental forming technology has also been used for the metal bellows forming process [274].…”

Section: Emerging Incremental Forming Methodsmentioning

confidence: 99%

“…Water jet incremental forming technology has also been used for the metal bellows forming process [274]. ISF has been studied by many researchers using laser [275,276], ultrasonic [98,[277][278][279], electromagnetic [280,281], and electrical heating [175,282,283], and in addition, a novel design using integral electric heating instead of local heating for incremental forming was proposed by Li et al [169]. Furthermore, electrically-assisted double-sided incremental forming was investigated by Xu [47].…”

Section: Emerging Incremental Forming Methodsmentioning

confidence: 99%

Emerging Trends in Single Point Incremental Sheet Forming of Lightweight Metals

Trzepieciński

Oleksik

Pepelnjak

et al. 2021

Metals

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Lightweight materials, such as titanium alloys, magnesium alloys, and aluminium alloys, are characterised by unusual combinations of high strength, corrosion resistance, and low weight. However, some of the grades of these alloys exhibit poor formability at room temperature, which limits their application in sheet metal-forming processes. Lightweight materials are used extensively in the automobile and aerospace industries, leading to increasing demands for advanced forming technologies. This article presents a brief overview of state-of-the-art methods of incremental sheet forming (ISF) for lightweight materials with a special emphasis on the research published in 2015–2021. First, a review of the incremental forming method is provided. Next, the effect of the process conditions (i.e., forming tool, forming path, forming parameters) on the surface finish of drawpieces, geometric accuracy, and process formability of the sheet metals in conventional ISF and thermally-assisted ISF variants are considered. Special attention is given to a review of the effects of contact conditions between the tool and sheet metal on material deformation. The previous publications related to emerging incremental forming technologies, i.e., laser-assisted ISF, water jet ISF, electrically-assisted ISF and ultrasonic-assisted ISF, are also reviewed. The paper seeks to guide and inspire researchers by identifying the current development trends of the valuable contributions made in the field of SPIF of lightweight metallic materials.

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“…Improved formability due to electric pulses could be affected by a reduction of dislocation density and a boost to its mobility [ 97 ]. In addition, a weakened base texture and weakened anisotropy leads to improved formability [ 98 ]. Asgar et al [ 99 ] investigated the DC pulse assisted by TPIF process, where the cathode is connected to the upper punch tool and the anode to the bottom, while the tool moves independently.…”

Section: Thermally-assisted Incremental Sheet Formingmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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Incremental sheet forming of titanium and its alloys has a significant role in modern manufacturing techniques because it allows for the production of high-quality products with complex shapes at low production costs. Stamping processes are a major contributor to plastic working techniques in industries such as automotive, aerospace and medicine. This article reviews the development of the single-point incremental forming (SPIF) technique in titanium and its alloys. Problems of a tribological and microstructural nature that make it difficult to obtain components with the desired geometric and shape accuracy are discussed. Great emphasis is placed on current trends in SPIF of difficult-to-form α-, α + β- and β-type titanium alloys. Potential uses of SPIF for forming products in various industries are also indicated, with a particular focus on medical applications. The conclusions of the review provide a structured guideline for scientists and practitioners working on incremental forming of titanium and titanium alloy sheets. One of the ways to increase the formability and minimize the springback of titanium alloys is to treat them at elevated temperatures. The main approaches developed for introducing temperature into a workpiece are friction heating, electrical heating and laser heating. The selection of an appropriate lubricant is a key aspect of the forming process of titanium and its alloys, which exhibit unfavorable tribological properties such as high adhesion and a tendency to adhesive wear. A review of the literature showed that there are insufficient investigations into the synergistic effect of rotational speed and tool rotation direction on the surface roughness of workpieces.

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Formability and deformation mechanism of Ti-6Al-4V sheet under electropulsing assisted incremental forming

Cited by 29 publications

References 16 publications

A Novel Tool to Enhance The Lubricant Efficiency On Induction Heat-Assisted Incremental Sheet Forming of Ti-6Al-4V Sheets

A Novel Tool to Enhance The Lubricant Efficiency On Induction Heat-Assisted Incremental Sheet Forming of Ti-6Al-4V Sheets

Emerging Trends in Single Point Incremental Sheet Forming of Lightweight Metals

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

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