scholarly journals Thermoplastic Forming of Metallic Glasses

2018 ◽  
Author(s):  
Ning Li ◽  
Jiang Ma
Keyword(s):  
Metallic Glasses ◽  
Thermoplastic Forming

scholarly journals A Conflict of Fineness and Stability: Platinum- and Palladium-Based Bulk Metallic Glasses for Jewellery

2020 ◽  
Author(s):  
O. S. Houghton ◽  
A. L. Greer
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Precious Metals ◽  
High Hardness ◽  
Scratch Resistance ◽  
Cast State ◽  
High Definition ◽  
Glass Forming ◽  
Thermoplastic Forming ◽  
Near Net Shape

For the metals used in jewellery, high hardness and the associated scratch resistance are much sought after. Conventional crystalline alloys for jewellery are alloyed and extensively processed (thermally and mechanically) to improve hardness, but it is difficult to reach values beyond 300 HV. The advent of bulk metallic glasses, based on precious metals and with hardness exceeding 300 HV in the as-cast state, is therefore of great interest for both jewellery and watchmaking. The non-crystalline structure of these materials not only gives high hardness, but also the opportunity to shape metals like plastics, via thermoplastic forming. For more traditional jewellery manufacture, bulk metallic glasses also exhibit high-definition and near-net-shape casting. Gold-based alloys have long dominated the consideration of bulk metallic glasses for jewellery as they can comply with 18K hallmarks. Although bulk metallic glasses based on platinum or palladium possess excellent thermoplastic formability, and are without known tarnishing problems, achieving useful glass-forming ability within the more restrictive hallmarking standards typically used for jewellery (≥95 wt.% Pt or Pd) is, at best, challenging. In this review, platinum- and palladium-based bulk metallic glasses are discussed, focusing on their potential application in jewellery and on the further research that is necessary.

Micro-patterning by thermoplastic forming of Ni-free Ti-based bulk metallic glasses

2017 ◽  
Vol 120 ◽  
pp. 204-211 ◽  
Author(s):  
Supriya Bera ◽  
Baran Sarac ◽  
Sascha Balakin ◽  
Parthiban Ramasamy ◽  
Mihai Stoica ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Micro Patterning ◽  
Thermoplastic Forming

Microscale Thermoplastic Forming of Bulk Metallic Glasses: Numerical Simulations and Experiments

2008 ◽  
Author(s):  
David L. Henann ◽  
Lallit Anand
Keyword(s):  
Numerical Simulation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Processing Parameters ◽  
Hot Embossing ◽  
Simulation Tool ◽  
Processing Conditions ◽  
Trial And Error ◽  
Physical Experiments ◽  
Thermoplastic Forming

An extremely promising microscale processing method for bulk metallic glasses called thermoplastic forming has emerged in recent years. However, most of the recent experimental thermoplastic forming studies have been conducted by trial-and-error. In this paper, the large-deformation constitutive theory of Henann and Anand [1] is used as a numerical simulation tool for the design of micro-hot-embossing processes. This numerical simulation capability is used to determine appropriate processing parameters in order to carry out several successful micron-scale hot-embossing operation on the metallic glass Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vitreloy-1). By carrying out the corresponding physical experiments, it is demonstrated that microscale features in Vitreloy-1 may be accurately replicated under the processing conditions determined by use of the numerical simulation capability.

Microscale Thermoplastic Forming of Bulk Metallic Glasses: Numerical Simulation and Experiments

2007 ◽  
Vol 1048 ◽  
Author(s):  
David Henann ◽  
Lallit Anand
Keyword(s):  
Numerical Simulation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Processing Parameters ◽  
Hot Embossing ◽  
Processing Method ◽  
Simulation Tool ◽  
Processing Conditions ◽  
Trial And Error ◽  
Thermoplastic Forming

AbstractAn extremely promising microscale processing method for bulk metallic glasses called thermoplastic forming has emerged in recent years. However, most of the recent experimental thermoplastic forming studies have been conducted by trial-and-error. In this paper, we use the large-deformation constitutive theory of Henann and Anand [1] as a numerical simulation tool for the design of a micro-hot-embossing process. This numerical simulation capability is used to determine appropriate processing parameters in order to carry out a successful micron-scale hot-embossing operation on the metallic glass Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vitreloy-1). By carrying out a corresponding physical experiment, we demonstrate that micron-scale features in Vitreloy-1 may be accurately replicated under the processing conditions determined by use of the numerical simulation capability.

scholarly journals Sub-second thermoplastic forming of bulk metallic glasses by ultrasonic beating

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Jiang Ma ◽  
Xiong Liang ◽  
Xiaoyu Wu ◽  
Zhiyuan Liu ◽  
Feng Gong
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Thermoplastic Forming

A new CoFe-based bulk metallic glasses with high thermoplastic forming ability

2013 ◽  
Vol 69 (7) ◽  
pp. 553-556 ◽  
Author(s):  
Qikui Man ◽  
Akihisa Inoue ◽  
Yaqiang Dong ◽  
Jian Qiang ◽  
Chengliang Zhao ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Thermoplastic Forming

scholarly journals Thermoplastic forming of bulk metallic glasses

2017 ◽  
Vol 66 (17) ◽  
pp. 176404
Author(s):  
Ma Jiang ◽  
Yang Can ◽  
Gong Feng ◽  
Wu Xiao-Yu ◽  
Liang Xiong
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Thermoplastic Forming

scholarly journals A criterion of ideal thermoplastic forming ability for metallic glasses

2020 ◽  
Vol 187 ◽  
pp. 221-226
Author(s):  
Hyun Seok Oh ◽  
So Yeon Kim ◽  
Chae Woo Ryu ◽  
Eun Soo Park
Keyword(s):  
Metallic Glasses ◽  
Thermoplastic Forming

Controllable thermoplastic forming of bulk metallic glasses in milliseconds by resistance welding forming

2019 ◽  
Vol 6 (7) ◽  
pp. 075210
Author(s):  
Jiang Ma ◽  
Zhiyuan Huang ◽  
Haonan Zheng ◽  
Feng Gong ◽  
Xiong Liang
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Resistance Welding ◽  
Thermoplastic Forming

Thermoplastic Forming of Bulk Metallic Glasses

2012 ◽  
Vol 3 (2) ◽  
pp. 180-187 ◽  
Author(s):  
Sébastien Gravier ◽  
Georges Kapelski ◽  
Michel Suéry ◽  
Jean-Jacques Blandin
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Thermoplastic Forming
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