[
ABSTRAKMaterial Fe-Mn-C telah banyak dikembangkan sebagai material mampu luruh untuk aplikasi penyangga pembuluh dalam satu dekade belakangan ini. Penggunaan biomaterial
Fe-Mn-C mampu menghindari tindakan pembedahan kembali setelah pembuluh jantung
kembali normal setelah mengalami penyempitan, yaitu sekitar 6-12 bulan. Pengujian material Fe-Mn-C dilakukan untuk mencari kelayakan kandidat biomaterial ini digunakan
sebagai penyangga pembuluh yang mampu luruh. Komposisi Mn digunakan sebagai
variabel pengujian, yaitu Fe-25Mn-0.8C dan Fe-35Mn-0.8C. Material tersebut dibuat
dengan cara pemaduan mekanik kemudian metalurgi serbuk. Karakterisasi serbuk hasil
pemaduan mekanik menunjukkan terjadinya reduksi ukuran partikel dan membentuk
paduan serbuk yang lebih merata. Hasil pengujian kekerasan dengan Rockwell A menunjukkan bahwa kekerasan material Fe-24Mn-0.42C adalah 43 HRA dan Fe-33Mn-
0.27C adalah 49 HRA, nilai kekerasan tersebut memiliki nilai kekerasan yang lebih tinggi
dari material SS 316L. Hasil pengujian polarisasi menunjukkan laju korosi untuk Fe-
24Mn-0.42C adalah 0.84 mmpy dan Fe-35Mn-0.8C 0.34 mmpy. Nilai tersebut lebih
tinggi dari besi murni tetapi lebih rendah dari paduan magnesium. Hasil uji mikrostruktur
dengan uji metalografi dan uji XRD menunjukkan fasa austenit. Berdasarkan pengujian
ini, menunjukkan bahwa pengaruh komposisi Mn untuk meningkatkan kekerasan
material. Pada pengujian ini juga menunjukkan proses pemaduan mekanik mampu
meningkatkan kekerasan material dan menurunkan laju korosi material.
ABSTRAKFe-Mn-C materials has been developed as biodegredable material for coronary stent
application in recent decades. The use of Fe-Mn-C biomaterials is able to avoid surgery
after heart vessels returned to normal condition after a constriction, which is about 6-12
months. Material testing of Fe-Mn-C alloy is performed to proving of feasibility that
biomaterials candidate for biodegredable coronary stent. Mn composition is used for the
test variable, namely Fe-25Mn-0.8C and Fe-35Mn-0.8C. That material is from
production of mechanical alloying and then powder metallurgy. Powder as-mechanical
alloying characterization shows particle reduction size and make a alloy powder is more
evenly. Result of hardness test with Rockwell A showed the hardness of Fe-24Mn-0.42C
is 43 HRA and hardness of Fe-33Mn-0.27C is 49 HRA. That hardness value is bigger
than hardness value of SS 316 L material. The result of polarization test shows corrosion
rate of Fe-24Mn-0.42C is 0.84 mmpy and 0.34 mmpy for Fe-33Mn-0.27C. That corrosion
rate is higher than pure iron and lower than magnesium alloy. Microstructure test with
metallographic test and XRD test shows austenitic phase. Based on this research shows
that effect of Mn composition is for increasing hardness value. On this research is shows
that mechanical alloying can increasing hardness of material and decreasing corrosion
rate., Fe-Mn-C materials has been developed as biodegredable material for coronary stent
application in recent decades. The use of Fe-Mn-C biomaterials is able to avoid surgery
after heart vessels returned to normal condition after a constriction, which is about 6-12
months. Material testing of Fe-Mn-C alloy is performed to proving of feasibility that
biomaterials candidate for biodegredable coronary stent. Mn composition is used for the
test variable, namely Fe-25Mn-0.8C and Fe-35Mn-0.8C. That material is from
production of mechanical alloying and then powder metallurgy. Powder as-mechanical
alloying characterization shows particle reduction size and make a alloy powder is more
evenly. Result of hardness test with Rockwell A showed the hardness of Fe-24Mn-0.42C
is 43 HRA and hardness of Fe-33Mn-0.27C is 49 HRA. That hardness value is bigger
than hardness value of SS 316 L material. The result of polarization test shows corrosion
rate of Fe-24Mn-0.42C is 0.84 mmpy and 0.34 mmpy for Fe-33Mn-0.27C. That corrosion
rate is higher than pure iron and lower than magnesium alloy. Microstructure test with
metallographic test and XRD test shows austenitic phase. Based on this research shows
that effect of Mn composition is for increasing hardness value. On this research is shows
that mechanical alloying can increasing hardness of material and decreasing corrosion
rate.]
S53410-Rhidiyan Waroko.pdf :: Unduh