Budiarto, Budiarto (2021) Pengaruh Temperatur Artificial Age Terhadap Kekerasan, Kekuatan luluh, dan Kerapatan Dislokasi pada Paduan Al97,11Mg1,52Si0,86Zn0,51 = Effect of Artificial Age Temperature on Hardness, Yellow Strength, and Dislocation Density of Al97,11Mg1,52Si0,86Zn0,51 Alloy. JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY, 5 (2). pp. 115-133. ISSN 2549-6239
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Abstract
Telah dilakukan penelitian pengaruh temperatur artificial age terhadap kekerasan, kekuatan luluh, dan kerapatan dislokasi pada paduan Al97,11Mg1,52Si0,86Zn0,51. Sampel paduan Al97,11Mg1,52Si0,86Zn0,51 ini dibuat dengan metalurgi butiran selanjutnya dilakukan pemanasan T6 ( pemanasan solid solution pada temperatur 530 0C selama 1 jam dan variasi temperatur artificial age 1400C, 1700C, dan 2000C serta waktu selama 1 jam. Hasil pengujian kekerasan menunjukkan bahwa paduan Al97,11Mg1,52Si0,86Zn0,51 kekerasan naik akibat adanya variasi temperatur artificial age. Pengamatan struktur mikro menunjukkan struktur hypoeutektik terdiri dari dendrit aluminium primer dan campuran eutektik paduan Al97,11Mg1,52Si0,86Zn0,51. Hasil analisa kerapatan dislokasi, regangan mikro, dan ukuran kristal setelah perlakuan panas T6 menunjukkan bahwa paduan Al97,11Mg1,52Si0,86Zn0,51. terdiri dari fasa α-Al, dan fasa Mg2Si.Hasil artificial age mengakibatkan terjadinya rekristalisasi dan pertumbuhan butir yang terbukti dengan naiknya regangan mikro dari 25,05% menjadi 32,83% pada bidang indeks Miller (311), naiknya ukuran kristalit dari 7,6734 nm menjadi 21,3354 nm, turunnya kerapatan dislokasi dari 0,0624 1/m2 menjadi 0.0067 1/mm2 dan turunnya kekuatan luluh dari 573,54 MPa menjadi 312,65 MPa. Kata kunci: Paduan Al97,11Mg1,52Si0,86Zn0,51, kerapatan dislokasi, kekerasan, XRD. / The dislocation density, micro lattice strain, crystal size, microstructure and hardness of T6 heating treatment have been carried out with variations in temperature of artificial age in Al97,11Mg1,52Si0,86Zn0,51 alloys. The Al97,11Mg1,52Si0,86Zn0,51 alloy sample was made with granular metallurgy and then T6 was heated (solid solution heating at 530 0C for 1 hour and temperature variations of artificial age 1400C, 1700C, and 2000C and time for 1 hour). The hardness test results showed that the Al97,11Mg1,52Si0,86Zn0,51alloy increased due to variations in artificial age temperatures. Microstructure observation shows hypoeutectic structure consisting of primary aluminum dendrite and eutectic mixture of Al97,11Mg1,52Si0,86Zn0,51. The results of the analysis of dislocation density, microstructure, and crystal size after T6 heat treatment showed that the Al97,11Mg1,52Si0,86Zn0,51 alloy. consists of the -Al phase, and the Mg2Si phase. The results of artificial age resulted in recrystallization and grain growth as evidenced by an increase in micro- strain from 25.05% to 32.83% in the Miller index (311), an increase in crystallite size from 7.6734 nm to 21.3354 nm, and a decrease in dislocation density. from 0.0624 1/mm2 to 0.0067 1/mm2 and a decrease in yield strength from 573.54 MPa to 312.65 Mpa. Keywords: Al97,11Mg1,52Si0,86Zn0,51 Alloys, dislocation density, hardness, XRD
Item Type: | Article |
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Subjects: | TECHNOLOGY |
Depositing User: | Mr Sahat Maruli Tua Sinaga |
Date Deposited: | 11 Oct 2023 09:43 |
Last Modified: | 11 Oct 2023 09:43 |
URI: | http://repository.uki.ac.id/id/eprint/12508 |
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