http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Manas Kumar Mondal (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Anticorrosion Performance of FCAW Cladding with Regard to the Influence of Heat Input
Manas Kumar Saha,Ajit Mondal,Ritesh Hazra,Santanu Das 대한용접·접합학회 2018 대한용접·접합학회지 Vol.36 No.5
Heat input plays a significant role in flux cored arc welding (FCAW) for producing quality welding. Weld cladding improves corrosion resistance and other mechanical properties. Selection of appropriate heat input is required to get optimum quality of the cladding. In this experiment, FCAW cladding of duplex stainless steel is done on low alloy steel under CO₂ gas shield. Three sets of heat input are chosen for experimentation in which each level of heat input comprised of three sets of current and voltage in such a way that the heat input level remained nearly constant. The output parameters like corrosion rate is measured and microstructures are evaluated. The relationship between heat input and corrosion rate is evaluated by means of polynomial regression analysis and the results matched with proposed model with small variations. The results showed that corrosion rate increases with increase in heat input within the experimental domain. Minimum corrosion rate is obtained in the present investigation at 0.49 kJ/mm heat input with 170A weld current, 27V weld voltage and 7.5 mm/s weld torch travel speed. For a particular heat input, corrosion rate is found to vary with different weld current. Microstructure of duplex stainless steel cladding shows presence of austenite phase, and ferrite phase. For an increase in heat input, the microstructure of clad part sacrifices more amount of ferrite phase that exhibits more amount of corrosion.
-
Prosanta Biswas,Surajit Patra,Himadri Roy,Chandra Sekhar Tiwary,Manas Paliwal,Manas Kumar Mondal 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.6
Effect of manganese (Mn) addition (0.0, 1.0, 2.0 and 3 wt%) on the microstructural morphology, hardness, tensile propertiesand fracture behaviour of the gravity cast eutectic Al–12.6Si alloy has been studied through XRD analysis, chemical analysis,optical metallography, FESEM analysis, energy dispersive spectroscopy analysis, hardness test, tensile test and quantitativephase analysis. As-cast Al–12.6Si–0.0Mn alloy has a non-uniformly distributed coarser and irregular shape primary andeutectic silicon particles inside the α-Al phase, and both the Si phase have very sharp corners. Whereas, the 1 wt% Mn addedalloy has uniformly distributed fine eutectic and primary Si particles with blunt corners. Further, the addition of 1.0 wt% Mnforms very few (0.26 vol %) irregular shape Al15(MnFe)3Si2 intermetallic phase within the α-Al phase and eutectic Si phase. But, 2.0 wt% and 3 wt% Mn added alloy has an irregular shape coarse plate-like Al15(MnFe)3Si2 intermetallic phase besidesthe primary and eutectic Si phase. The bulk hardness of the Al–12.6Si alloy is increased with an increase in Mn concentrationas the harder Al15(MnFe)3Si2 intermetallic phase forms and both the Si phase morphology modify. The microhardness ofthe constituent phases also varies with the change in Mn concentration in the alloy. The Mn addition improved the ultimatetensile strength, yield strength, and elongation (%) of the alloy. However, fractographs reveal that the brittle mode of fracturehas been increased due to the presence of a higher volume of brittle Al15(MnFe)3Si2 intermetallic in 2.0 and 3.0% Mn alloy. On the other hand, the amount of brittle and cleavage fracture of Si particles decreased, and ductile fracture with dimplesformation increased in 1.0 wt%Mn added alloy.
KCI
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
