Effect of Heat Treatment on the Behaviour of WC-Co Cemented Carbide Alloy Under Repeated Impact Loading

In the civil and structural engineering field, there are so many problems regarding act of impact loading against some structures due to natural disaster. So it is important to evaluate the damage condition of them after impact loading, and to estimate the residual performance of them. This study is focused on a reinforced concrete (herein after called RC) structure such as caisson breakwater and rock-shed. In order to quantitatively evaluate the dynamic behavior and cumulative damage of RC members under low-velocity single and repeated impact loading, we conducted numerical approach by using the theory of Continuum Damage Mechanics (herein after called CDM). At the result, we clarified not only impact behavior of the members but also the relationship between cumulative kinetic energy of repeated impact loading and cumulative damage of the members. In addition, applicability limit of our model based on scalar damage modeling was clarified.

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Effect of Heat Treatment on the Microstructure and Properties of Ultrafine WC–Co Cemented Carbide

Metals ◽

10.3390/met9121302 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1302

Author(s):

Zhongnan Xiang ◽

Zhanjiang Li ◽

Fa Chang ◽

Pinqiang Dai

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Service Life ◽

Treatment Process ◽

Cutting Conditions ◽

Cemented Carbide ◽

Cemented Carbides ◽

Heat Treatment Process ◽

Microstructure And Properties ◽

Ultrafine Grained

In this paper, the effect of heat treatment on the microstructure and properties of a 0.8 μm WC–10%Co ultrafine cemented carbide was studied. The results show that the microstructural differences in ultrafine WC–Co cemented carbides without and with heat treatment are mainly reflected in the Co phase. For conventional cemented carbides, the hardness and wear resistance can be increased only at the expense of the toughness and strength. An ultrafine-grained WC–Co cemented carbide with good hardness and toughness can be obtained by strengthening the Co phase through an appropriate heat treatment process, and the service life of the ultrafine-grained WC–Co cemented carbide can be improved under actual cutting conditions.

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Synthesis of Cr-doped APT in the evaporation and crystallization process and its effect on properties of WC-Co cemented carbide alloy

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2016.10.022 ◽

2017 ◽

Vol 64 ◽

pp. 248-254 ◽

Cited By ~ 2

Author(s):

Linsheng Wan ◽

Liang Yang ◽

Xuepin Zeng ◽

Xingren Lai ◽

Lifu Zhao

Keyword(s):

Crystallization Process ◽

Cemented Carbide ◽

Carbide Alloy

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Crack Propagation of CCT Foam Specimen under Impact Fatigue

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.118-120.32 ◽

2010 ◽

Vol 118-120 ◽

pp. 32-36 ◽

Cited By ~ 1

Author(s):

Jae Ung Cho ◽

Li Yang Xie ◽

Chong Du Cho ◽

Sang Kyo Lee

Keyword(s):

High Strain Rate ◽

Impact Loading ◽

High Strain ◽

Nickel Foam ◽

Fatigue Properties ◽

Foam Material ◽

Impact Fatigue ◽

Repeated Impact ◽

Repeated Impacts ◽

The Impact

The objective of this study is to investigate the effect of the low or high strain rate on the impact fatigue properties of the nickel foam material and to understand the lifetime of this material which is subjected to the repeated impacts at different energy levels. Failures of foam materials under single and repeated impacts analogous to fatigue are essential to designers and users in military and aerospace structures. The material failure induced by repeated impact loading becomes a critical issue because of significant loss of stiffness and compressive strength in the foam material. Testing methods to study impact(that is, high strain rate) fatigue are quite numerous; no single standard testing procedure is defined for studying the impact fatigue property of a material. The increasing application of foam material in aerospace structures, owing to high specific stiffness and strength has attracted a great concern about the high sensitivity to impact damage introduced during manufacture or in service, and the effects of such damage on structural degradation. To investigate this issue, this study sets up an experimental procedure to determine the impact fatigue properties of nickel foam material. This study performs both experimental and numerical investigations to catch the impact fatigue behavior of nickel foam with open type. Design life and probability of failure or survival at specified life can be calculated so that the fatigue life of nickel core material subjected to repeated impact loading is predicted.

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