Al-Cu-Mu 주조합금의 피로성질에 미치는 Sn 첨가의 영향

김경현; 김정대; 김인배; Kyung-Hyun Kim; Jung-Dae Kim; In-Bae Kim

Korean Journal of Materials Research, Vol.12, No.4, 248-253, April, 2002

DOI10.3740/MRSK.2002.12.4.248 Export Citation

Al-Cu-Mu 주조합금의 피로성질에 미치는 Sn 첨가의 영향

Effect of Sn Addition on the Fatigue Properties of Al-Cu-Mn Cast Alloy

김경현, 김정대¹, 김인배^{1, †}

한국기계연구원
¹부산대학교 재료공학과

Kyung-Hyun Kim, Jung-Dae Kim¹, and In-Bae Kim^{1, †}

Dept. of Materials Engineering, Korea Institute of Machinery and Materials, Changwon 641-010, Korea
¹School of Materials Science and Engineering, Pusan National University, Pusan 609-735, Korea

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Effect of Sn addition on the fatigue properties of Al-Cu-Mn cast alloy was investigated by low and high cycle fatigue tests. Fatigue life showed the maximum value of 5450cycles in the Al-Cu-Mn alloy containing 0.10%Sn, but decreased rapidly beyond 0.20% of Sn additions. It was found that the fatigue strength was 132MPa and fatigue ratio was 0.31 in the alloy containing 0.10%Sn. Metallographic observation revealed that the fatigue crack initiated at the surface and propagated along the grain boundary. This propagation path was attributed to the presence of PFZ along the grain boundary. The tensile strength increased from 330MPa in 7he Sn-free Al-Cu-Mn cast alloy to 429MPa in the alloy containing 0.10%Sn. But above 0.20%Sn additions, tensile strength was decreased by the segregation of Sn.

Keywords:Al-Cu-Mn cast alloy;effect of Sn addition;fatigue life;fatigue strength;fatigue ratio;tensile strength

[References]

Plambridge WJ, J. Mater. Sci., 7, 939 (1972)
Polmear IJ, Trans. Met. Soc. AIME, 230, 1331 (1964)
Kim KH, Lee TH, Park JG, Kim IB, J. Kor. Inst. Met. Mater., 37, 142 (1999)
Lee CH, Kim KH, Kim IB, Korean J. Mater. Res., 11(4), 266 (2001)
Kim KH, Lee BH, Kim IB, Korean J. Mater. Res., 11(4), 300 (2001)
Ringer SP, Hono K, Sakurai T, Met. Mater. Trans. A., 26, 2207 (1995)
Boyd JD, Nicholson RB, Acta Metall., 19, 1101 (1971)
Sulley AH, Hardy HK, Heal T, J. Inst. Met., 76, 269 (1949)
Park JG, MS thesis Pusan National University, (1998) (1998)
Sanders TH, Jr, Ludwiczak EA, Sawtell RR, Mat. Sci. Eng., 43, 247 (1980)
Nicholson RB, J. Inst. Met., 95, 91 (1967)
Fuchs HO, Stephens RI, Metal Fatigue in Engineering, Wiley & Sons, Inc. p.298 (1980) (1980)
Dieter GE, Mechanical Metallurgy, McGraw-Hill p.137 (1988) (1988)

[Referenced By]

[1] Plambridge WJ, J. Mater. Sci., 7, 939 (1972)

[2] Polmear IJ, Trans. Met. Soc. AIME, 230, 1331 (1964)

[3] Kim KH, Lee TH, Park JG, Kim IB, J. Kor. Inst. Met. Mater., 37, 142 (1999)

[4] Lee CH, Kim KH, Kim IB, Korean J. Mater. Res., 11(4), 266 (2001)

[5] Kim KH, Lee BH, Kim IB, Korean J. Mater. Res., 11(4), 300 (2001)

[6] Ringer SP, Hono K, Sakurai T, Met. Mater. Trans. A., 26, 2207 (1995)

[7] Boyd JD, Nicholson RB, Acta Metall., 19, 1101 (1971)

[8] Sulley AH, Hardy HK, Heal T, J. Inst. Met., 76, 269 (1949)

[9] Park JG, MS thesis Pusan National University, (1998) (1998)

[10] Sanders TH, Jr, Ludwiczak EA, Sawtell RR, Mat. Sci. Eng., 43, 247 (1980)

[11] Nicholson RB, J. Inst. Met., 95, 91 (1967)

[12] Fuchs HO, Stephens RI, Metal Fatigue in Engineering, Wiley & Sons, Inc. p.298 (1980) (1980)

[13] Dieter GE, Mechanical Metallurgy, McGraw-Hill p.137 (1988) (1988)