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PNG Image - 87.1 KB - MD5: 42d7222607a5bda8ab687f06795d66e8
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Gambar 10. Fraktografi pada daerah tepi permukaan patahan hasil SEM, terlihat adanya striasi yang sangat halus.
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Gambar 11. Perbesaran dari area lingkaran warna merah, terlihat adanya retakan-retakan memanjang pada bagian tepi permukaan patahan.
PNG Image - 78.1 KB - MD5: c34b6f9550fdc0f027381e1b01a02d9f
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Gambar 12. Penampang melintang as sink rollpada area retak.
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Gambar 13. Penampang melintang logam las pada area retak, tampak adanya mikroporositas.
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Gambar 14. Titik pengujian EDS pada inklusi yang ditemukan pada penampang melintang logam las dan HAZ
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Gambar 1. Skematik komponen as sink roll yang mengalami kegagalan (a) tampak samping (b) tampak atas/penampang melintang
PNG Image - 186.4 KB - MD5: 4cb1a3aba4364ba4b94ba14e4c05a451
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Gambar 2.Permukaan patahan dari as sink roll
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Gambar 4. Struktur mikro as sink roll (base metal), fasa perlit- ferit. Etsa Nital 2%.
PNG Image - 151.7 KB - MD5: c3e3bfd5397be785d906b799d2c954d7
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Gambar 5. Struktur mikro logam las, fasa ferite dengan bentuk acicular, perlit dan sedikit partikel sementit. Etsa Nital 2%.
PNG Image - 199.4 KB - MD5: 9938f1d252a761a4b0be8e6d2d3deaa5
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Gambar 6. Struktur mikro base metal, area HAZ (warna kekuningan) dan sedikit logam las. Etsa Nital 2%.
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