Effect on mechanics properties and microstructure of molybdenum by high intensity pulsed ion beam irradiation

Abstract

In this paper, high intensity pulsed ion beam (HIPIB) of 85% Cⁿ⁺ + 15% H⁺ was used to irradiate crystalline molybdenum. Before and after irradiation, the surface structure and mechanical properties were studied with different irradiation times and energy densities. After HIPIB irradiation, stress was generated inside the molybdenum. As the energy density increases, the thermal effect which was enhanced apparently causes a preferred orientation in the molybdenum. When the energy density reaches 1.6–2.5 J/cm² with 3 pulses, craters and cracks appear on the surface of molybdenum. Besides, the α-Mo₂C phase formed in the near-surficial region of molybdenum is beneficial to the hardness increasement. After HIPIB irradiation, the ratio of average hardness (H_irr/H_unirr) and Nix-Gao model show that the macro hardness of molybdenum decreases with the increase of pulse number and energy density. Compared with the effect of ion implantation on hardness improvement, the annealing effect of HIPIB thermal irradiation plays a more important role in the reduction of molybdenum hardness. The hardness of the molybdenum decreases under the combined action.

Original language	English
Article number	125333
Journal	Surface and Coatings Technology
Volume	384
DOIs	https://doi.org/10.1016/j.surfcoat.2020.125333
Publication status	Published - 25 Feb 2020

Keywords

Crystalline molybdenum
High intensity pulsed ion beam (HIPIB)
Mechanical properties
Microstructure

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.surfcoat.2020.125333

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@article{d1e7700c64d34ac392835ea888cee75b,

title = "Effect on mechanics properties and microstructure of molybdenum by high intensity pulsed ion beam irradiation",

abstract = "In this paper, high intensity pulsed ion beam (HIPIB) of 85% Cn+ + 15% H+ was used to irradiate crystalline molybdenum. Before and after irradiation, the surface structure and mechanical properties were studied with different irradiation times and energy densities. After HIPIB irradiation, stress was generated inside the molybdenum. As the energy density increases, the thermal effect which was enhanced apparently causes a preferred orientation in the molybdenum. When the energy density reaches 1.6–2.5 J/cm2 with 3 pulses, craters and cracks appear on the surface of molybdenum. Besides, the α-Mo2C phase formed in the near-surficial region of molybdenum is beneficial to the hardness increasement. After HIPIB irradiation, the ratio of average hardness (Hirr/Hunirr) and Nix-Gao model show that the macro hardness of molybdenum decreases with the increase of pulse number and energy density. Compared with the effect of ion implantation on hardness improvement, the annealing effect of HIPIB thermal irradiation plays a more important role in the reduction of molybdenum hardness. The hardness of the molybdenum decreases under the combined action.",

keywords = "Crystalline molybdenum, High intensity pulsed ion beam (HIPIB), Mechanical properties, Microstructure",

author = "Hao Zou and Lisong Zhang and Tong Guan and Xiaonan Zhang and Remnev, {Gennady E.} and Pavlov, {Sergey K.} and Younian Wang and Xianxiu Mei",

year = "2020",

month = feb,

day = "25",

doi = "10.1016/j.surfcoat.2020.125333",

language = "English",

volume = "384",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect on mechanics properties and microstructure of molybdenum by high intensity pulsed ion beam irradiation

AU - Zou, Hao

AU - Zhang, Lisong

AU - Guan, Tong

AU - Zhang, Xiaonan

AU - Remnev, Gennady E.

AU - Pavlov, Sergey K.

AU - Wang, Younian

AU - Mei, Xianxiu

PY - 2020/2/25

Y1 - 2020/2/25

N2 - In this paper, high intensity pulsed ion beam (HIPIB) of 85% Cn+ + 15% H+ was used to irradiate crystalline molybdenum. Before and after irradiation, the surface structure and mechanical properties were studied with different irradiation times and energy densities. After HIPIB irradiation, stress was generated inside the molybdenum. As the energy density increases, the thermal effect which was enhanced apparently causes a preferred orientation in the molybdenum. When the energy density reaches 1.6–2.5 J/cm2 with 3 pulses, craters and cracks appear on the surface of molybdenum. Besides, the α-Mo2C phase formed in the near-surficial region of molybdenum is beneficial to the hardness increasement. After HIPIB irradiation, the ratio of average hardness (Hirr/Hunirr) and Nix-Gao model show that the macro hardness of molybdenum decreases with the increase of pulse number and energy density. Compared with the effect of ion implantation on hardness improvement, the annealing effect of HIPIB thermal irradiation plays a more important role in the reduction of molybdenum hardness. The hardness of the molybdenum decreases under the combined action.

AB - In this paper, high intensity pulsed ion beam (HIPIB) of 85% Cn+ + 15% H+ was used to irradiate crystalline molybdenum. Before and after irradiation, the surface structure and mechanical properties were studied with different irradiation times and energy densities. After HIPIB irradiation, stress was generated inside the molybdenum. As the energy density increases, the thermal effect which was enhanced apparently causes a preferred orientation in the molybdenum. When the energy density reaches 1.6–2.5 J/cm2 with 3 pulses, craters and cracks appear on the surface of molybdenum. Besides, the α-Mo2C phase formed in the near-surficial region of molybdenum is beneficial to the hardness increasement. After HIPIB irradiation, the ratio of average hardness (Hirr/Hunirr) and Nix-Gao model show that the macro hardness of molybdenum decreases with the increase of pulse number and energy density. Compared with the effect of ion implantation on hardness improvement, the annealing effect of HIPIB thermal irradiation plays a more important role in the reduction of molybdenum hardness. The hardness of the molybdenum decreases under the combined action.

KW - Crystalline molybdenum

KW - High intensity pulsed ion beam (HIPIB)

KW - Mechanical properties

KW - Microstructure

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