新型高密度合金的组织与性能

Guan Qi Liu; Chun Xu Wang; Shao Zun Liu; Yong Li; Cheng Wen Tan; Zhi Chao Liu

doi:10.11868/j.issn.1001-4381.2017.001550

新型高密度合金的组织与性能

Translated title of the contribution: Microstructure and properties of a new high density alloy

Guan Qi Liu, Chun Xu Wang^*, Shao Zun Liu, Yong Li, Cheng Wen Tan, Zhi Chao Liu

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A new high density alloy NiW750 was developed, which was based on the faced-center cubic solid solution structure and aging strengthening mechanism. Microstructure of the alloy was observed by SEM and TEM. The material characteristics under dynamic compressing loading were investigated by using the split Hopkinson pressure bar test. The comparison among the NiW750, ultra high strength steel G50 and tungsten 93WNiFe was also conducted.The results show that the NiW750 high density alloy has the best comprehensive properties among three materials. After aging at 750℃/5h, the tensile strength of NiW750 can achieve up to 1746MPa, while the impact toughness (a_kU) can achieve 113J/cm². Under the condition of dynamic loading, the material shows strain rate hardening effect obviously as its dynamic flow stress can reach about 2250MPa. The adiabatic shear bands are formed within specimens in the direction of 45° to the central axis with a bandwidth of 80-150μm at the strain rate of about 5500s^-1 and a wide transition zone, so as to avoid the premature emergence of the shear fracture.

Translated title of the contribution	Microstructure and properties of a new high density alloy
Original language	Chinese (Traditional)
Pages (from-to)	154-160
Number of pages	7
Journal	Cailiao Gongcheng/Journal of Materials Engineering
Volume	47
Issue number	8
DOIs	https://doi.org/10.11868/j.issn.1001-4381.2017.001550
Publication status	Published - 20 Aug 2019

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title = "新型高密度合金的组织与性能",

abstract = "A new high density alloy NiW750 was developed, which was based on the faced-center cubic solid solution structure and aging strengthening mechanism. Microstructure of the alloy was observed by SEM and TEM. The material characteristics under dynamic compressing loading were investigated by using the split Hopkinson pressure bar test. The comparison among the NiW750, ultra high strength steel G50 and tungsten 93WNiFe was also conducted.The results show that the NiW750 high density alloy has the best comprehensive properties among three materials. After aging at 750℃/5h, the tensile strength of NiW750 can achieve up to 1746MPa, while the impact toughness (akU) can achieve 113J/cm2. Under the condition of dynamic loading, the material shows strain rate hardening effect obviously as its dynamic flow stress can reach about 2250MPa. The adiabatic shear bands are formed within specimens in the direction of 45° to the central axis with a bandwidth of 80-150μm at the strain rate of about 5500s-1 and a wide transition zone, so as to avoid the premature emergence of the shear fracture.",

keywords = "Adiabatic shear band, Aging strengthening, Faced-center cubic, High density alloy, Mechanical property",

author = "Liu, {Guan Qi} and Wang, {Chun Xu} and Liu, {Shao Zun} and Yong Li and Tan, {Cheng Wen} and Liu, {Zhi Chao}",

year = "2019",

month = aug,

day = "20",

doi = "10.11868/j.issn.1001-4381.2017.001550",

language = "繁体中文",

volume = "47",

pages = "154--160",

journal = "Cailiao Gongcheng/Journal of Materials Engineering",

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T1 - 新型高密度合金的组织与性能

AU - Liu, Guan Qi

AU - Wang, Chun Xu

AU - Liu, Shao Zun

AU - Li, Yong

AU - Tan, Cheng Wen

AU - Liu, Zhi Chao

PY - 2019/8/20

Y1 - 2019/8/20

N2 - A new high density alloy NiW750 was developed, which was based on the faced-center cubic solid solution structure and aging strengthening mechanism. Microstructure of the alloy was observed by SEM and TEM. The material characteristics under dynamic compressing loading were investigated by using the split Hopkinson pressure bar test. The comparison among the NiW750, ultra high strength steel G50 and tungsten 93WNiFe was also conducted.The results show that the NiW750 high density alloy has the best comprehensive properties among three materials. After aging at 750℃/5h, the tensile strength of NiW750 can achieve up to 1746MPa, while the impact toughness (akU) can achieve 113J/cm2. Under the condition of dynamic loading, the material shows strain rate hardening effect obviously as its dynamic flow stress can reach about 2250MPa. The adiabatic shear bands are formed within specimens in the direction of 45° to the central axis with a bandwidth of 80-150μm at the strain rate of about 5500s-1 and a wide transition zone, so as to avoid the premature emergence of the shear fracture.

AB - A new high density alloy NiW750 was developed, which was based on the faced-center cubic solid solution structure and aging strengthening mechanism. Microstructure of the alloy was observed by SEM and TEM. The material characteristics under dynamic compressing loading were investigated by using the split Hopkinson pressure bar test. The comparison among the NiW750, ultra high strength steel G50 and tungsten 93WNiFe was also conducted.The results show that the NiW750 high density alloy has the best comprehensive properties among three materials. After aging at 750℃/5h, the tensile strength of NiW750 can achieve up to 1746MPa, while the impact toughness (akU) can achieve 113J/cm2. Under the condition of dynamic loading, the material shows strain rate hardening effect obviously as its dynamic flow stress can reach about 2250MPa. The adiabatic shear bands are formed within specimens in the direction of 45° to the central axis with a bandwidth of 80-150μm at the strain rate of about 5500s-1 and a wide transition zone, so as to avoid the premature emergence of the shear fracture.

KW - Adiabatic shear band

KW - Aging strengthening

KW - Faced-center cubic

KW - High density alloy

KW - Mechanical property

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M3 - 文章

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JO - Cailiao Gongcheng/Journal of Materials Engineering

JF - Cailiao Gongcheng/Journal of Materials Engineering

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ER -

新型高密度合金的组织与性能

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