Microstructure Change for Multi-Pass Welding Between Austenitic Stainless Steel and Carbon Steel

Le, Thiquynhxuan; Khanh, Pham Mai; Hoang, Anh Tuan; Bui, Tam Ngoc; Nguyen, Duc-Toan

doi:10.26480/jmerd.02.2018.97.102

Cited by 18 publications

(9 citation statements)

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“…However, it is independent of cutting velocities [18]. The study results indicate that thermal-assisted machining allows the use of a higher cutting speed compared to conventional machining for a particular tool life [19][20][21][22]. Ginta et al [23] investigated the advantages of thermal-assisted of machinability improvement analysis when milling the Ti-6Al-4V titanium alloy under magnetic induction heating [24].…”

Section: Introductionmentioning

confidence: 99%

[RETRACTED] Experimental Study on Impact of Thermal-Assisted Machining on SKD11 Steel Machinability

Hoang¹,

Nguyen²,

Truong³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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Machining in a heated environment has been used in pressure machining and metal cutting. Thermal-assisted machining is a new machining method performed on conventional machine tools, CNC machines, in which the workpiece is heated before machining. Different heat sources do the thermal-assisted: electrical energy, laser beam, magnetic induction. However, there is very little research on thermal-assisted machining when milling SKD11 steel, a difficult-in-processing material but widely used in the industry. Material machinability refers to the ability of material machining that is difficult or easy. Material machinability is measured by tool life, material removal ability, shear force, cutting vibration, surface roughness. The material's machinability is directly influenced by its microscopic structure and is related to the cutting mode. This paper has highlighted the study of material machinability when thermal-assisted machining and compared to the conventional one. This study also highlights the crucial role in assessing the effect of heating on the SKD11 steel machinability. This study analyzed the technological parameters' role on the shear force, chip shrinkage, surface roughness, and shear vibrations during normal machining and SKD11 steel heating. The study results showed that the material's microstructure and the amplitude of vibration did not change under the heating process's effect with a temperature range of 200 o C -400 o C. However, the shearing force during heat processing is drastically reduced compared to conventional machining. Chip shrinkage increased by 31.7% when heated to 400 o C, while roughness decreased by 47.1%.

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Section: Introductionmentioning

confidence: 99%

[RETRACTED] Experimental Study on Impact of Thermal-Assisted Machining on SKD11 Steel Machinability

Hoang¹,

Nguyen²,

Truong³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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show abstract

“…Planning on the development of Vietnam's seaport system up to 2020 and orientations to 2030, comprising 6 seaport groups with the objective of ensuring through the whole volume of import and export goods and exchanges between regions and regions in the country. By sea, meeting the requirements of socio-economic development of the country with the capacity adopted in accordance with the planning of the seaport system at specific times: reaching 640 to 680 million tons/year (of which Synthetic cargoes, containers of between 375 and 400 million tons/year) by 2020; reaching from 1,040 to 1,160 million tons / year (of which synthetic goods, containers of 630 to 715 million tons / year) by 2030; To concentrate on building international gateway ports in Hai Phong, Ba Ria-Vung Tau and the key economic region of the Central Vietnam, capable of receiving ships of up to 100,000 DWT, container ships of up to 8,000 TEU or larger; have the capacity to integrate the role of international container transshipment; To build large-scale specialized ports for metallurgical complexes [17]- [23], petrochemical refineries, coal-fired thermal power plants [14].…”

Section: B Building Strategies Planning and Policies For The Developm...mentioning

confidence: 99%

Strategies for Maritime Development: A case in Vietnam

Nguyen

2018

EJENG

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Strategic assessors of the 21st century are "The Century of the Ocean," because, along with current economic and demographic growth, natural resources, especially non-renewable resources on land, will be exhausted after several decades. The world economy is increasingly dependent on the sea and the ocean. About 70% of the world's industrial potential is in the 500km wide area of ??the coast. The mineral, biological and marine resources of the oceans and oceans have an important implication for the world economy. Marine ecosystems are the most important resource with hundreds of thousands of animals, plants, and microorganisms. Sea is a diversified and abundant source of seafood, chemicals, salt, oil and gas, clean energy from the sea and oceans, wind, seawater, ocean currents, and the tide is being exploited for transportation, energy and countless other human benefits. The sea and the continental shelf are waterways that can develop tourism, sightseeing and recreation activities. The role of marine economics, including maritime economics, has become increasingly important and has been identified as a key sector for investment. This paper analyzes the advantages, limitations, and causes in maritime economic development, and draws on experiences to develop the maritime economy.

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“…Smog is created when oils are burned in places like power plants, industrial plants, and cars, releasing toxins [6] such as carbon dioxide into the atmosphere and which itself is classed as a type of harmful greenhouse gas [7]. Also oil pollution in the oceans and seas from oil leaking from our cars and other machinery which can then washed into the ocean through drains or oil spills from ships [8]- [10], oil tankers and oil rigs directly into the seas, can cause tremendous harm to ocean life [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

Ocean Energy - A Clean Energy Source

Nguyen¹,

Dong²

2019

EJERS

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The world is constantly seeking new sources of energy to replace the use of coal and fossil fuels to generate electricity. And a strong source of energy from the ocean is one of the hopes of scientists around the world. Ocean energy is an endless renewable energy source for making electricity used for the world. Marine technology was once considered too expensive to be a viable source of alternative clean energy, especially compared to already developed products such as wind and solar. However, with the increased price of oil and the issues of global warming and national security, U.S. coastal sites are looking to add ocean energy to their renewable energy portfolios. This paper gives an overview of ocean energy technologies, focusing on two different types: wave, tidal. It outlines the operating principles, the status, and the efficiency and cost of generating energy associated with each technology.

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Microstructure Change for Multi-Pass Welding Between Austenitic Stainless Steel and Carbon Steel

Cited by 18 publications

References 0 publications

[RETRACTED] Experimental Study on Impact of Thermal-Assisted Machining on SKD11 Steel Machinability

[RETRACTED] Experimental Study on Impact of Thermal-Assisted Machining on SKD11 Steel Machinability

Strategies for Maritime Development: A case in Vietnam

Ocean Energy - A Clean Energy Source

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