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

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.

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.

Recognition and Control of the Influence Factors on the Surface Defects of Cold Rolled Strip with Emulsion Lubrication

2013 ◽  
Vol 456 ◽  
pp. 498-502
Author(s):  
Yan Li ◽  
Jian Lin Sun
Keyword(s):  
Cold Rolling ◽  
Surface Quality ◽  
Surface Defects ◽  
Surface Condition ◽  
Influence Factors ◽  
Black Spot ◽  
Rolling Process ◽  
Rolled Strip ◽  
Strip Surface ◽  
Cold Rolled

In cold rolling, good surface quality should be maintained with the requirement of constant increasing productivity. Oil-in-water (O/W) emulsions are widely used in cold rolled strips due to their good characteristics as lubricants and coolants. The strip surface defect is one of the central quality problems in the rolling process. A poor strip surface quality after cold rolling may have a large impact on the downstream process, like annealing, galvanization and painting. The surface condition could be deteriorated in many forms affected by various factors. However, few reports focused on the effect of the lubricating property of emulsion on the final surface quality. In this paper, the general surface defects of cold rolled strips such as watermark defects, black spot defects, heat scratches and corrosion defects were analyzed by scan electron microscope (SEM) and energy spectrum analysis (EDS) and the morphology and composition of the defects have been researched. The reason of the surface defects generated is analyzed, and the factors which introduce the surface defects during rolling process are presented. Therefore, it has an important significance to identify the features of the surface defects and put forward the solution measures.

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.

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.

Design of Automatic Detection Device for Steel Bar Surface Defects

2012 ◽  
Vol 532-533 ◽  
pp. 390-393 ◽  
Author(s):  
Jian Chuan Zhang ◽  
Wu Bin Li ◽  
Chang Hou Lu
Keyword(s):  
Image Processing ◽  
Surface Quality ◽  
Automatic System ◽  
Surface Defects ◽  
Detection System ◽  
High Luminance ◽  
Linear Ccd ◽  
Steel Bar ◽  
And Performance

To inspect the surface quality of steel bar, we designed an automatic system including linear camera and laser. Through the comparison among kinds of cameras, we select linear CCD to our system. The laser is also chosen by us with its high luminance and performance. Through a series of computation, we select the appropriate camera lens to our device. At last, we draw the whole detection system. This device has been used well and provides a good foundation for prospective image processing.

scholarly journals Reuse and upcycling of thermoset prepreg scrap: Case study with out-of-autoclave carbon fiber/epoxy prepreg

2017 ◽  
Vol 52 (3) ◽  
pp. 341-360 ◽  
Author(s):  
Gaurav Nilakantan ◽  
Steven Nutt
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Composite Laminates ◽  
Processing Conditions ◽  
End Products ◽  
And Performance ◽  
Out Of Autoclave ◽  
Carbon Fiber Epoxy ◽  
Microstructure And Performance

A large amount of uncured thermoset prepreg scrap is generated during manufacturing, including both ply cutter trim waste and out-of-spec material. While techniques to recycle end-of-life cured composite waste and reclaim carbon fiber are well established and commercialized, there is little effort made presently towards reusing uncured scrap prepreg. Here, we present a viable and scalable technique to process scrap prepreg into intermediate forms that can be readily manufactured into commercial end-products. Using out-of-autoclave carbon fiber/epoxy prepreg as an example, we report the mechanical properties, microstructure, and performance of composite laminates fabricated with scrap prepreg under various processing conditions. Demonstrator parts manufactured with scrap prepreg are also presented.

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.

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