Determination of the Content of Ultra-Low Sulphur in PM Superalloy FGH96 by Infrared Carbon-Sulphur Detector

PM Superalloy FGH96 is usually used as turbine disc materials. It is a kind of alloy with high purity, which has strict demands of the content of impurity elements, especially the element of sulphur. Because sulphur is accumulated in the grain boundary of manganese or iron, with the form of sulfide, it has great impact on the performance of PM Superalloy FGH96, such as toughness and fatigue property. Therefore, it is an important part of quantity control to detect accurately of the content of ultra-low sulphur in PM Superalloy FGH96. As the market demand of PM Superalloy FGH96 and quality becomes varied, it is a trend that PM Superalloy FGH96 has ultra-low content of sulphur (S: 0.0001%-0.0020%). Hence, the related analysis techniques are needed. A new method of analyzing Ultra-low Sulphur (S: 0.0001%-0.0020%) in PM Superalloy FGH96 is established in the article by selective experiments with relevant test conditions, such as combustion conditions and blank test, using infrared carbon-sulphur detector.

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The role of actively diffusing impurities of sulfur and oxygen in ductility-dip cracking susceptibility of Ni-Cr-Fe welds

Journal of Achievements of Materials and Manufacturing Engineering ◽

10.5604/01.3001.0012.7108 ◽

2018 ◽

Vol 2 (89) ◽

pp. 49-55 ◽

Cited By ~ 3

Author(s):

K.A. Yushchenko ◽

A.V. Zviagintseva ◽

L.M. Kapitanchuk ◽

I.S. Gakh

Keyword(s):

Solid Solution ◽

Grain Boundary ◽

Sample Surface ◽

Formation Of Cracks ◽

Boundary Model ◽

Heating Up ◽

Impurity Elements ◽

Content Design

Purpose: To determine the temperature conditions of sulphur and phosphorus moving to sample surface for alloys with different initial sulphur content. Design/methodology/approach: Investigation of samples from In 690, Kh20N16AG6, In52MSS alloys in Auger spectrometer JAMP-9500F for determination of the probability of saturation of the free surface (as grain boundary model) with sulphur from the solid solution. Results obtained without removing the samples from the chamber, stage-by-stage heating up to 800°C with determination of element content every 100°C. Findings: It is shown that sulphur has the tendency of diffusing to the interface from the middle of the grain body and forming segregations in the form of a monolayer even at its slight (0.00015 wt.%) content in the alloy. Research limitations/implications: Presence of actively diffusing impurities (C, O, H, S, P), dissolved in the metal, in the case of a gradient of temperatures and stresses, leads to redistribution of these impurities between the solid solution and surface of the sample, or solid solution and grain boundaries (interface). According to the obtained data, change of elemental composition proceeds within 0.5-1 nm from the grain boundary or from the sample surface and leads to formation of monolayers. Practical implications: To prevent the formation of cracks it is necessary not only to reduce the content of impurity elements in the alloy, but to prevent moving them to the boundary of grains and creating mono layers. Originality/value: For the selected alloys, the formation of monolayers is the most intensive at temperatures of 700-800° that coincides with DTR in the temperature range of 0.6-0.8 Ts. Such monolayers can lead to ductility dip cracks formation.

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ACCURATE DETERMINATION OF PARAMETERS OF INTERNAL FRICTION ASSOCIATED WITH GRAIN BOUNDARY

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19851085 ◽

1985 ◽

Vol 46 (C10) ◽

pp. C10-379-C10-382

Author(s):

JIANG ZI-YING ◽

CAI WEI-PING

Keyword(s):

Internal Friction ◽

Grain Boundary ◽

Accurate Determination ◽

Determination Of Parameters

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Earth-moving machinery. Determination of emission sound pressure level at operator's position. Dynamic test conditions

10.3403/30111143 ◽

2009 ◽

Keyword(s):

Sound Pressure Level ◽

Sound Pressure ◽

Dynamic Test ◽

Pressure Level ◽

Test Conditions

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DINAMIKA POLITIK PERSETUJUAN BERSAMA TENTANG PENETAPAN DESA ADAT DI KABUPATEN ROKAN HULU TAHUN 2014

Jurnal Ilmu Pemerintahan Nakhoda ◽

10.35967/jipn.v15i1.3850 ◽

2017 ◽

Vol 15 (1) ◽

pp. 21

Author(s):

Haryo Suganda ◽

Raja Muhammad Amin

Keyword(s):

Regulatory Region ◽

Field Research ◽

Analysis Techniques ◽

Political Dynamics ◽

Political Interests ◽

Wide Range ◽

Information Method ◽

Qualitative Descriptive ◽

The Village

This study is motivated the identification of policies issued by the regional Governmentof Rokan Hulu in the form of Regulatory region number 1 by 2015 on the determination of thevillage and Indigenous Village. Political dynamics based on various interests against themanufacture of, and decision-making in the process of formation of the corresponding localregulations determination of Indigenous Villages in the Rokan Hulu is impacted to a verysignificantamount of changes from the initial draft of the number i.e. 21 (twenty one) the villagebecame Customary 89 (eighty-nine) the Indigenous Villages who have passed. Type of thisresearch is a qualitative descriptive data analysis techniques. The research aims to describe theState of the real situation in a systematic and accurate fact analysis unit or related research, aswell as observations of the field based on the data (information). Method of data collectionwas done with interviews, documentation, and observations through fieldwork (field research).The results of the research on the process of discussion of the draft local regulations andmutual agreement about Designation of Indigenous Villages in the Rokan Hulu is, showed thatthe political dynamics that occur due to the presence of various political interests, rejectionorally by Villagers who were judged to have met the requirements of Draft Regulations to beformulated and the area for the set to be Indigenous Villages, and also there is a desire fromsome villages in the yet to Draft local regulations in order to set the Indigenous village , there isa wide range of interests of these aspects influenced the agreement to assign the entire localVillage which is in the Rokan Hulu become Indigenous village, and the village of Transmigrationinto administrative Villages where the initiator of the changes in the number of IndigenousVillages in the Rokan Hulu it is the desire of the local Government of its own.

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