USING THERMAL ANALYSIS AND INTERRUPTED QUENCHING TECHNIQUE TO EXAMINE INTERACTIVE EFFECT OF BI-SR ON POROSITY FORMATION CHARACTERISTICS IN AL-7SI-0.4MG ALLOY

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FARAHANY SAEED

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Journal: FOUNDING RESEARCH JOURNAL Year:2018 | Volume:1 | Issue:3 Page(s): 181-191

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Title

USING THERMAL ANALYSIS AND INTERRUPTED QUENCHING TECHNIQUE TO EXAMINE INTERACTIVE EFFECT OF BI-SR ON POROSITY FORMATION CHARACTERISTICS IN AL-7SI-0.4MG ALLOY

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FARAHANY SAEED | Issue Writer Certificate

Keywords

ALUMINUM

THERMAL ANALYSIS

POROSITY

BISMUTH

STRONTIUM

CRITICAL SOLID FRACTION

Abstract

In this research, cooling curve THERMAL ANALYSIS and interrupted quenching technique were employed to examine interactive effect of Sr-Bi on POROSITY characteristics of the Al-7Si-0.4Mg alloy commonly used in industry. Based on obtained cooling curve profile and plotting the first and second derivative curves, solidification process of the alloy was studied. Solid fraction curves were calculated and corresponding exact temperatures for precipitation of 20, 45 and 80% solid for alloys with different Sr/Bi ratios, namely 0.1, 0.34 and 0.46 were determined. Subsequently, alloys were quenched rapidly at determined temperatures in the same solid fraction. POROSITY characteristics consist of size, area and density were measured using an optical microscope equipped with image analyzer software. Results show that the size, area and density of POROSITY were affected by Sr/Bi ratio and solid fraction percentage. Area percentage and size of POROSITY increased by 75% and 141% respectively with increase of Sr/Bi ratio from 0.1 to 0.46. CRITICAL SOLID FRACTION for the nucleation and growth of POROSITY in the alloys were determined at 70% and 80%respectively while Sr and Bi co-existed.

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APA: Copy

FARAHANY, SAEED. (2018). USING THERMAL ANALYSIS AND INTERRUPTED QUENCHING TECHNIQUE TO EXAMINE INTERACTIVE EFFECT OF BI-SR ON POROSITY FORMATION CHARACTERISTICS IN AL-7SI-0.4MG ALLOY. FOUNDING RESEARCH JOURNAL, 1(3 ), 181-191. SID. https://sid.ir/paper/265678/en

Vancouver: Copy

FARAHANY SAEED. USING THERMAL ANALYSIS AND INTERRUPTED QUENCHING TECHNIQUE TO EXAMINE INTERACTIVE EFFECT OF BI-SR ON POROSITY FORMATION CHARACTERISTICS IN AL-7SI-0.4MG ALLOY. FOUNDING RESEARCH JOURNAL[Internet]. 2018;1(3 ):181-191. Available from: https://sid.ir/paper/265678/en

IEEE: Copy

SAEED FARAHANY, “USING THERMAL ANALYSIS AND INTERRUPTED QUENCHING TECHNIQUE TO EXAMINE INTERACTIVE EFFECT OF BI-SR ON POROSITY FORMATION CHARACTERISTICS IN AL-7SI-0.4MG ALLOY,” FOUNDING RESEARCH JOURNAL, vol. 1, no. 3 , pp. 181–191, 2018, [Online]. Available: https://sid.ir/paper/265678/en

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