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.

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 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.

Effect of Nd on the Microstructure and Mechanical Properties of High Aluminum Zinc-Based Alloy

2011 ◽  
Vol 391-392 ◽  
pp. 564-568
Author(s):  
Ai Li Wei ◽  
Kun Yu Zhang ◽  
Xian Rong Li ◽  
Wei Liang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elevated Temperatures ◽  
Grain Refining ◽  
Micro Hardness ◽  
Microstructure And Mechanical Properties ◽  
Hardness Tests ◽  
And Performance ◽  
Microstructure And Performance ◽  
High Aluminum

This work mainly investigated the influence of element Nd on the microstructure and mechanical properties of the Zn-25Al-5Mg-2.5Si alloys with different Nd contents. The tensile and hardness tests were carried out at room and elevated temperatures. The results show that the addition of element Nd leads to the grain refining and the formation of Al2Nd and NdZn2 phases in the microstructure, and the mechanical properties of the alloys rise at first and then drop with the increasing of Nd content. The optimization of microstructure and performance especially the tensile strength at high temperature is obtained when Nd content is 0.8 wt.%. It can result in increase of tensile strength by 48.8% and micro-hardness by 67.4% at 180。C.

scholarly journals Effect of Heat Treatment on the Microstructure and Performance of Cu Nanofoams Processed by Dealloying

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2691
Author(s):  
Jenő Gubicza ◽  
Péter Jenei ◽  
Gigap Han ◽  
Pham Tran Hung ◽  
Youngseok Song ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
High Specific Surface Area ◽  
Cu Alloy ◽  
And Performance ◽  
Underlying Mechanisms ◽  
Microstructure And Performance

Cu nanofoams are promising materials for a variety of applications, including anodes in high-performance lithium-ion batteries. The high specific surface area of these materials supports a high capacity and porous structure that helps accommodate volume expansion which occurs as batteries are charged. One of the most efficient methods to produce Cu nanofoams is the dealloying of Cu alloy precursors. This process often yields nanofoams that have low strength, thus requiring additional heat treatment to improve the mechanical properties of Cu foams. This paper provides the effects of heat treatment on the microstructures, mechanical properties, and electrochemical performance of Cu nanofoams. Annealing was conducted under both inert and oxidizing atmospheres. These studies ultimately reveal the underlying mechanisms of ligament coarsening during heat treatment.

scholarly journals Properties investigation of austempered ductile iron

10.30544/137 ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 25-30
Author(s):  
Sudhanshu Detwal ◽  
Deivanathan R
Keyword(s):  
Mechanical Properties ◽  
Ductile Iron ◽  
Heat Treatments ◽  
Ductile Cast Iron ◽  
Casting Technique ◽  
Different Temperatures ◽  
Sand Mould ◽  
Austempering Temperature ◽  
Iron Material ◽  
Mould Casting

This work concerns microstructural and mechanical properties of an austempered ductile cast iron (ADI). The ductile iron material was produced by the sand mould casting technique. Afterwards, austempering heat treatment was applied to the specimens at two different temperatures of 250°C and 350°C. Austempered Ductile Irons (ADIs) were produced successfully by different two-stage heat treatments, to obtain favorable microstructure and hardness. The microstructure and hardness obtained by such variable heat treatments were compared. The austempering temperature and time were found to be decisive parameters in obtaining a desired ADI microstructure.

Mechanical Properties of Tempered Ti-Nb Alloyed Ductile Iron

2013 ◽  
Vol 393 ◽  
pp. 126-129
Author(s):  
Bulan Abdullah ◽  
Siti Khadijah Alias ◽  
Ahmed Jaffar ◽  
Abdul Hakim Abdullah ◽  
Syazuan Abdul Latip ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Ductile Iron ◽  
Casting Process ◽  
Xrd Analysis ◽  
Tempering Temperature ◽  
Microstructure Observation ◽  
Different Temperatures ◽  
Process Heat ◽  
And Performance

The applications of ductile iron in numerous engineering applications require continuous effort in properties enhancement due to the necessity of product sustainability and performance. The studies highlighted the effect of 0.5 wt% titanium and niobium addition the mechanical properties of tempered ductile iron. The samples were prepared through conventional CO2 sand casting process. Heat treatment was conducted by austenitizing at 900°C for 1 hour and subsequently oil quenching before tempered at three different temperatures which are 500°C, 600°C and 700°C at 1 hour holding time. The mechanical properties were evaluated through impact (ASTM E23) and hardness (Rockwell) test. Microstructure observation and XRD analysis was also performed on as cast and tempered samples. The findings indicated that increasing the tempering temperature at 700°C enhanced the hardness and tensile strength of tempered alloyed ductile iron compared to other samples. The enhancement of the mechanical properties of tempered alloyed ductile iron is expected to further expand the applications of ductile iron.

Effect of Strontium and T6 Heat Treatment on Structure and Performance of Al-11.6Si-0.5Mg Alloy

2013 ◽  
Vol 749 ◽  
pp. 1-6
Author(s):  
Ji Xing Lin ◽  
Jun Ping Zhang ◽  
Li Yuan Niu ◽  
Da Ren Sun ◽  
Zi Mu Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Eutectic Structure ◽  
Air Cooling ◽  
Water Cooling ◽  
T6 Heat Treatment ◽  
Sr Modification ◽  
Economic Process ◽  
And Performance ◽  
Microstructure And Performance

In this study, Strontium (Sr) was added as modifier during the casting of Al-11.6Si-0.5Mg alloy, and the effect of T6 heat treatment on microstructure and performance of alloy was also investigated. The results showed that the 0.3% Al-8%Sr master alloy can refine effectively the α-Al dendrite and eutectic structure; the best economic process of T6 heat treatment is solution at 535°C for 6 hrs., and water cooling at 50~60°C,aging at 160°C for 6 hrs , then air cooling. After Sr modification and T6 heat treatment, the mechanical properties of alloy are improved remarkably, i.e., the tensile strength increased to 348MPa from 183MPa before modification and the elongation raises from 3.0% to 6.5%. So this alloy is applied to the strain clamp products in electric power fitting industry.

Effect of Preparation Process on Surface Quality and Microstructure of Titanium Sheet

2019 ◽  
Vol 944 ◽  
pp. 79-84
Author(s):  
Ze Yu Zhang ◽  
Wei Yu ◽  
En Tao Dong ◽  
Jia Xin Shi
Keyword(s):  
Mechanical Properties ◽  
Surface Quality ◽  
Surface Defects ◽  
Chromatic Aberration ◽  
Lateral Direction ◽  
Cold Rolled ◽  
Foreign Surface ◽  
And Performance ◽  
Black Area ◽  
Microstructure And Performance

At present, domestic cold-rolled titanium sheets have many surface defects, which are significantly different from foreign surface quality. This paper mainly studies the differences in the microstructure and performance of titanium plates GR1 and GR2 imported from Japan and domestic titanium plates TA1, and analyzes the causes of surface defects to solve the problem about TA1. The surface properties of different materials were observed. The mechanical properties of the materials were obtained by room temperature tensile test. The surface roughness of the three materials was tested. The microstructure and composition of the three materials were characterized by SEM, EDS and XRD. The results show that the surface of GR1 and GR2 is brighter and has no obvious chromatic aberration. The surface chromatic aberration of TA1 is larger. The mechanical properties of TA1 are the best. The tensile strength and yield strength of rolling are 325.19MPa and 271.17MPa, respectively, and the lateral direction is 329.19MPa and The roughness of 303.15MPa, GR1 and GR2 is slightly lower than that of TA1. The black area on the surface of TA1 is loose and the oxygen content is high. The pole figure of GR1, GR2 and TA1 are obtained. Keywords: Cold-rolled titanium sheets; Chromatic aberration; Mechanical properties; SEM; Texture

Influence of Nickel on the Microstructure and Mechanical Properties of Nodular Cast Iron

2021 ◽  
Vol 1023 ◽  
pp. 61-66
Author(s):  
Watsada Siripongtana ◽  
Rungsinee Canyook
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Ductile Iron ◽  
Nickel Content ◽  
Nodular Cast Iron ◽  
Strength Increase ◽  
Microstructure And Mechanical Properties ◽  
Nickel Addition ◽  
Tensile Strength Increase

This research investigates the nickel content added by 1.1wt%, 2.2wt%, 3.7wt% and 4.5wt% on the microstructure and mechanical properties in the nodular cast iron. The results demonstrate that the microstructure of nickel addition consists of nodule graphite, ferrite and pearlite phase while nickel was added to 4.5 wt% the microstructure becomes ferrite transform to fully pearlite phase. In addition the ductile iron has the highest nodularity (0.79%), followed by 1.1%Ni (0.75%), 2.2%Ni (0.71%), 3.7%Ni (0.69%) and 4.5%Ni (0.58%). The hardness and tensile strength increase when increasing the nickel content. Elongation is enhanced with nickel increasing and reaches a maximum of 12% at 1.1 wt% Ni, then decreases with the further increase of nickel.

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