scholarly journals Effect of Scrap Content on the Impact Property and Fatigue Property of AC4A Alloy

2016 ◽  
Vol 36 (6) ◽  
pp. 187-194
Author(s):  
Heon-Joo Kim
Keyword(s):  
Fatigue Property ◽  
Impact Property ◽  
The Impact

Effects of the Self-Healing Microcapsules on the Impact Property of Polymer Composite Gear

2011 ◽  
Vol 66-68 ◽  
pp. 683-687 ◽  
Author(s):  
Li Zhang ◽  
Yan Jue Gong ◽  
Shuo Zhang
Keyword(s):  
Glass Fiber ◽  
Polymer Composite ◽  
The Self ◽  
Impact Property ◽  
Self Healing ◽  
Fiber Reinforced ◽  
Mechanical Impact ◽  
Glass Fiber Reinforced ◽  
The Impact

By designing the different formulations of the composites and adopting optimized technology including extrusion and molding, the effects of the Micro-capsules on the properties of nylon composites are analyzed by the impact property test. The mechanical impact property of the glass fiber reinforced nylon composites is influenced little if the content of the self-healing microcapsules added is less than 3.5%, and the technology of self-healing microcapsules used in the polymer composite gear is feasible.

Study on the Influence of High Temperature Homogenizing and Solution on the Microstructure and Property of 4Cr5MoSiV1 Steel

2012 ◽  
Vol 549 ◽  
pp. 567-571
Author(s):  
Luo Yi
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Impact Toughness ◽  
Thermal Fatigue ◽  
Fatigue Behavior ◽  
Fatigue Property ◽  
Eutectic Carbides ◽  
The Core ◽  
Thermal Fatigue Behavior ◽  
The Impact

4Cr5MoSiV1 steel, a widely used for hot work mould, contains Cr, Mo, V alloying elements that easily form carbides. The Micro-area chemical composition, microstructure, impact toughness and thermal fatigue behavior of 4Cr5MoSiV1 and 4Cr5MoSiV1H steels were investigated, the latter was carried on high temperature homogenizing and solution based on the former. The results showed that bulk eutectic carbides and elements segregation contained in the 4Cr5MoSiV1 steel reduced the impact toughness. But the impact toughness of the core of the mould steel block and thermal fatigue property of 4Cr5MoSiV1H steel were improved because the elements segregation and eutectic carbides was eliminated through the high temperature homogenizing and solution.

A Repeated Impact Method and Instrument to Evaluate the Impact Fatigue Property of Drillpipe

2012 ◽  
Vol 22 (4) ◽  
pp. 1064-1071 ◽  
Author(s):  
Yuanhua Lin ◽  
Qiang Li ◽  
Yongxing Sun ◽  
Hongjun Zhu ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Fatigue Property ◽  
Impact Fatigue ◽  
Repeated Impact ◽  
The Impact

Effect of Tempering on Bendability and Impact Property of Hot Rolled Low-Carbon Martensitic Steel

2018 ◽  
Vol 941 ◽  
pp. 474-479
Author(s):  
Sung Il Kim ◽  
Seok Jong Seo ◽  
In Shik Suh
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Impact Property ◽  
Alloying Elements ◽  
Bending Test ◽  
Low Carbon ◽  
Martensitic Steels ◽  
Tempering Temperature ◽  
Impact Properties ◽  
The Impact

We examined the effects of tempering process and alloying elements on the microstucture, tensile properties, bendability and impact property of direct quenched (DQ), and re-austenitizing and quenched (RQ) low-carbon martensitic steels. For this purpose, four low carbon martensitic steels (Fe-0.07C-1.8Mn-Cr-Nb-Ti-B) were selected. We have investigated the effects of tempering temperature and alloying elements of chromium (Cr), titanium (Ti) and niobium (Nb) on mechanical properties and microstructures. Mechanical properties and microstructures were analyzed as well using tensile test, V-bending test, charpy V-notched impact test and electron microscopy for DQ, DQ and tempered (DQ-T), RQ and RQ and tempered (RQ-T) low-carbon martensitic steels. It has been found that the as-quenched microstructures of the DQ and RQ specimens were fully martensitic structure. Prior austenite grain size and effective grain size after quenching were larger in the case of RQ steel. In both cases, tempering made the needle-shaped carbides. It is shown that the strength decreased when the tempering temperature increased. The strengths of the DQ and DQ-T steels were 30~50MPa higher than those of the RQ and RQ-T steels. Despite the higher strength of the DQ and DQ-T states, both had similar impact properties with the RQ and RQ-T states. However, the impact properties of the Nb added RQ and RQ-T steels with fine martensite morphology exhibited higher than those of DQ and DQ-T steels.

Study on the Influence of Processing Condition on Impact Property of Injection-Molded Polycarbonate

2012 ◽  
Vol 151 ◽  
pp. 135-138
Author(s):  
Ying Hui Shang ◽  
Bo Wang ◽  
Fang Fang Wang ◽  
Zhi Xin Wang ◽  
Chun Tai Liu
Keyword(s):  
Thermal Treatment ◽  
Impact Strength ◽  
Injection Molding ◽  
Processing Condition ◽  
Impact Property ◽  
Impact Tests ◽  
Injection Molded ◽  
Plastic Components ◽  
Injection Molded Plastic ◽  
The Impact

The impact property of injection-molded plastic components is an important factor to judge their quality. The aim of this paper is to study the effects of processing conition on impact property of injection-molded polycarbonate (PC). By changing the processing conitions such as injection molding parameters and thermal treatment, different impact samples were acquired. Then, Izod and Charpy notch impact tests were carried out to research the relation between the impact strength and the prcessing conditions. The results imply that different processing conitions will lead to different changes of impact property.

Effect of Different Tempering Temperatures on Microstructure and Impact Property of 20CrMnTi Steel

2014 ◽  
Vol 900 ◽  
pp. 92-95
Author(s):  
Sheng Xu Liu ◽  
Yi Qiang Xiao ◽  
Ming Long Kang ◽  
Jian Min Zeng ◽  
Guo An Wang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
High Temperature ◽  
Low Temperature ◽  
Fracture Morphology ◽  
Optical Microscope ◽  
Impact Property ◽  
Medium Temperature ◽  
The Impact ◽  
Type Of Fracture ◽  
Scanning Electron

The effect of different tempering temperatures on microstructure and impact property of 20CrMnTi steel has been studied on Zwick/roell Amsler PKP 450 pendulum machine, SU-8020 scanning electron microscope (SEM) and optical microscope. The results shows that the impact property of 20CrMnTi steel is dramatically improved after high-temperature tempering. However, the minimum value occurs when it was tempered at 350°C because of low-temperature tempering brittlement at this degree. The SEM fracture morphology was typical dimples after high temperature tempering, and the type of fracture was ductile fracture; the type of cleavage characteristic and quasi cleavage characteristic were generated on the fracture morphology at low-temperature and medium-temperature tempering respectively, and the type of fracture was brittle.

Dispersion and Impact Strength of Epoxy Resin/Nano-Al2O3 Composites

2013 ◽  
Vol 761 ◽  
pp. 161-164 ◽  
Author(s):  
Nai Kui Gao ◽  
Zhou Xu ◽  
Chun Wu ◽  
Rui Hua Li ◽  
Hai Yun Jin
Keyword(s):  
Impact Strength ◽  
Epoxy Resin ◽  
Surface State ◽  
Coupling Agent ◽  
High Speed ◽  
Impact Property ◽  
Al2o3 Content ◽  
Shear Dispersion ◽  
The Impact ◽  
Agent Treatment

This paper focuses on the influence of nano-Al2O3 surface state and composite process on the dispersion of nano-Al2O3 filler. Toughening was performed to epoxy resin by nano-Al2O3, and the effect of impact property of epoxy resin/nano-Al2O3 composites was studied. The results showed that coupling agent treatment and high-speed shear dispersion can improve many properties of the composites. With nano-Al2O3 content increasing, the impact strength of the composites increased at first and then decreased. The maximum appears when the nano-Al2O3 content reached 3wt. %, no matter with or without the coupling agent treatment, which is 87.4% and 78.6% higher than that of monolithic epoxy resin respectively. The coupling agent treatment of nano-Al2O3 helped to improve the impact strength of the composites.

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