Effect of Subcritical Quenching on Microstructure and Mechanical Properties of EH36 Alloy

2014 ◽  
Vol 886 ◽  
pp. 59-62
Author(s):  
Xiao Dong Luo ◽  
Yong Xiang Zhu ◽  
Hao Liu
Keyword(s):  
Mechanical Properties ◽  
Controlled Rolling ◽  
Impact Property ◽  
Plate Steel ◽  
Controlled Cooling ◽  
Quenching Temperature ◽  
Temperature Impact ◽  
And Performance ◽  
The Impact ◽  
Microstructure And Performance

Subcritical quenching is a kind of heat treatments, which have good strength and higher Plastic toughness. Through this process, the ship plate steels microstructure and performance can be promoted evidently. This article studies the effect of subcritical quenching temperature on the microstructure and performance of controlled rolling and controlled cooling (TMCP) EH36 ship plate steel with the thickness of 15mm,by mechanical properties text and optical microscopy. The results show that the comprehensive property of TMCP ship plate steel can be enhanced remarkably, its hardness and plasticity could be improved obviously,especially the low temperature impact property. With the increasing of quenching temperature,the grain grows,the impact property is decreased.

Effect of Normalizing on Microstructure and Mechanical Properties of EH36 Alloy

2014 ◽  
Vol 487 ◽  
pp. 110-113 ◽  
Author(s):  
Xiao Dong Luo ◽  
Yong Xiang Zhu ◽  
Hao Liu ◽  
Mei Ying Li
Keyword(s):  
Mechanical Properties ◽  
Controlled Rolling ◽  
Impact Property ◽  
Plate Steel ◽  
Controlled Cooling ◽  
Temperature Impact ◽  
And Performance ◽  
The Impact ◽  
Microstructure And Performance ◽  
Comprehensive Property

Normalizing is a kind of heat treatments, which have lower cost and higher efficiency. Through this process, the ship plate steel’s microstructure and performance can be promoted evidently. This article studies the effect of normalizing temperature on the microstructure and performance of controlled rolling and controlled cooling (TMCP) EH36 ship plate steel with the thickness of 15mm ,by mechanical properties text and optical microscopy. The results show that the comprehensive property of TMCP ship plate steel can be enhanced remarkably,although it’s hardness could be decrease,the plasticity of it can be improved obviously,especially the low temperature impact property. With the increasing of normalizing temperature,the grain grows,the impact property is decreased.

Effect of Heat Treatment on Microstructure and Mechanical Properties of EH36 Alloy

2014 ◽  
Vol 487 ◽  
pp. 177-180 ◽  
Author(s):  
Xiao Dong Luo ◽  
Hao Liu ◽  
Yong Xiang Zhu ◽  
Cai Yu Zheng
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Optical Microscope ◽  
Controlled Rolling ◽  
Plate Steel ◽  
Controlled Cooling ◽  
Impact Performance ◽  
Mechanics Performance ◽  
Temperature Impact ◽  
Quenching And Tempering

The appropriate heat treatment process may obviously enhance the material mechanics performance, lengthens the service life of the machine parts , reduces the exploitation conditions of the material . This article uses mechanical properties test and the optical microscope research quenching and tempering comprehensive heat treatment craft is 15mm controls to thickness controlled rolling and controlled cooling (TMCP) condition tissue and the properties of the EH36 level ship plate steel influence. The result indicated that, after the heat treatment the TMCP condition ship plate steel overall performance has enhances greatly, although has the drop slightly in the intensity, but its plasticity, the low temperature impact performance all has the distinct improvement in particular.

Effect of Intercritical Quenching Temperature on the Microstructure and Performance of 650 MPa Low-Carbon Structural Steel

2012 ◽  
Vol 602-604 ◽  
pp. 329-332
Author(s):  
Hai He Luo ◽  
De Hui Zou ◽  
Han Xiong Dong ◽  
Zhong Bo Dong
Keyword(s):  
Structural Steel ◽  
Volume Fraction ◽  
Mechanical Test ◽  
Optical Microscope ◽  
Low Carbon ◽  
Quenching Temperature ◽  
Carbon Structural Steel ◽  
And Performance ◽  
The Impact ◽  
Microstructure And Performance

The effect of intercritical quenching temperature on the microstructure and performance of a 650 MPa low-carbon structural steel was investigated by optical microscope and mechanical test. The results showed that the obtained microstructures at different temperature were mainly bainites, the volume fraction of the bainites was gradually increased and the size of which became finer with the increase of the quenching temperature. Moreover, as the temperature increased, the yield strength and tensile strength gradually increased; the yield ratio decreased initially and then increased; the impact energy increased among the temperature range of T3°C and T4°C, subsequently dropped significantly at T5°C, and then increased atT6°C. The best comprehensive performance was obtained at T4°C in this study.

scholarly journals Characteristics and mechanical properties changes due to incorporation of aloe vera in polyethylene-based film

2020 ◽  
Vol 17 (2) ◽  
pp. 61
Author(s):  
Siti Fatma Abd Karim ◽  
Junaidah Binti Jai ◽  
Ku Halim Ku Hamid ◽  
Abdul Wafi Abdul Jalil
Keyword(s):  
Mechanical Properties ◽  
Thermal Degradation ◽  
Aloe Vera ◽  
Functional Materials ◽  
Chain Structure ◽  
Substantial Effect ◽  
Scanning Calorimetry ◽  
Degradation Temperature ◽  
And Performance ◽  
The Impact

Non-degradable properties of polyethylene (PE) films due to long-chain structure cause increment of solid waste plastic. Many researchers, with different purposes, have studied the incorporation of functional materials to PE. Studying the impact of incorporation of aloe vera (AV) into PE films in terms of its characteristic and mechanical properties is the main objective of this paper. The films were prepared using melt-blending and hot press technique. The characterization assessed for the PE and PE-AV films were spectroscopy, crystalline phase, thermal analysis and performance of mechanical properties of the sample.  The functional group detected in spectroscopy studied did not show any changes for PE film or PE with the presence of AV. Lower thermal degradation temperature (Td) obtained for PE-AV3 while others film found no significant changes of Td value and only one peak of thermal degradation occurred for all film. The same goes to the analysis obtained from differential scanning calorimetry (DSC) data. However, the crystalline structure displayed momentous peak changes for PE with AV. The highest tensile strength (TS) obtained by PE-AV3, at once developing highest value of Young’s modulus (YM), modulus of resilience (UE) and modulus of toughness (UT). A certain amount of AV has substantial effect on changing the polymeric structure especially improving the mechanical properties of PE film. Therefore, AV has potential to become an additive for developing a new partially degradable PE film.

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.

The Effect of Cr Content on the Microstructure and Performance of Heat Resistant Nodular Cast Iron

2012 ◽  
Vol 430-432 ◽  
pp. 273-276 ◽  
Author(s):  
Hong Bo Li ◽  
Hai Tao Li ◽  
Chun Jie Li ◽  
Li Jie Qu
Keyword(s):  
Mechanical Properties ◽  
Ductile Iron ◽  
Nodular Cast Iron ◽  
Cr Content ◽  
Heat Resistant ◽  
Spherical Graphite ◽  
Temperature Heat ◽  
And Performance ◽  
Iron Material ◽  
Microstructure And Performance

By way of alloying, a sort of low-chromium heat-resistant ductile iron material was developed. Through the observation of microstructure, testing of mechanical properties and process performance, heat-resistant test, the microstructure and properties of heat resistant ductile iron of low chromium was studied. The results show that microstructure of the developed heat-resistant ductile iron is spherical graphite distributed regularly on matrix of pearlite and a small amount of ferrite; mechanical properties, processing performance and high-temperature heat resistance of samples of different chrome composition are preferable, but 1.6% of chromium component possess the best performance.

Characteristics of Deformation-Induced Transformation in Steel 2.25Cr1Mo

2008 ◽  
Vol 385-387 ◽  
pp. 509-512
Author(s):  
Qing Fen Li ◽  
Hong Bin Chen
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Alloy Steel ◽  
Volume Fraction ◽  
Controlled Rolling ◽  
Low Alloy Steel ◽  
Cooling Process ◽  
Controlled Cooling ◽  
Steel Microstructure ◽  
Steel Strength

Characteristics of deformation-induced transformation (DIT) in the refractory low alloy steel 2.25Cr1Mo were experimentally studied. Effect of different controlled-rolling and controlled-cooling process on the steel microstructure and mechanical properties were investigated and the mechanism was discussed. Results show that the grain size and the ferrite volume fraction were obviously affected by the rolling and cooling processes. Proper DIT technique may significantly accelerate the transformation of austenite to ferrite in the steel and improve the steel strength.

Effect of Aging on Microstructure and Performance after Superplastic Deformation of Fine Grained 1420 Al-Li Alloy

2014 ◽  
Vol 936 ◽  
pp. 1647-1652
Author(s):  
Yan Ling Zhang ◽  
Hong Liang Hou ◽  
Yao Qi Wang
Keyword(s):  
Mechanical Properties ◽  
Artificial Aging ◽  
Superplastic Forming ◽  
Tensile Tests ◽  
Strengthening Mechanism ◽  
Fine Grained ◽  
And Performance ◽  
Relationship Of ◽  
Microstructure And Performance ◽  
Strength And Ductility

Superplastic forming (SPF) is an important process for forming fine grained 1420 Al-Li alloy. However, the mechanical properties will be decreased after deforming at high temperature. How to obtain the optimize relationship of strength and ductility after SPF is one of the key problems for the process. In this paper, a set of artificial aging tests including single and two-step aging were carried out, which are the typical strengthening process for Al-Li alloy. Based on experimental results, strength and elongation were studied by means of tensile tests at room temperature, and the effect of aging processes on mechanical properties was analyzed. Finally, the microstructures fore and after aging were examined by OM and TEM, and the strengthening mechanism of 1420 Al-Li alloy was further studied. It is found that artificial aging especially two-step aging can increase mechanical properties of post-SPF material obviously, and δ (Al3Li) is the primary strengthening phase.

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