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Tensile and Fatigue Strengths of Butt Joints in Titanium Soldered with 14K Gold and Ti-Ni-Cu Alloys

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Abstract

°á·Ð
º» ¿¬±¸¿¡¼­´Â ƼŸ´½ ³³Á¢ºÎÀÇ ÀÎÀå°­µµ¿Í ÇǷΠƯ¼ºÀ» Á¶»çÇϱâ À§ÇØ 14K ±Ý³³°ú
Ti-Ni-Cu ³³À» »ç¿ëÇÏ¿© À¶Á¦¿Í ¾Æ¸£°ï ºÐÀ§±âÀÇ Àü±âÀúÇ× °¡¿­ÀåÄ¡¿Í ¾Æ¸£°ï ºÐÀ§±âÀÇ Àû
¿Ü¼± °¡¿­ÀåÄ¡·Î ³³Á¢À» ½ÃÇàÇÏ¿´À¸¸ç, ÀÎÀå½ÃÇè°ú ÇǷνÃÇè °á°ú, ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú
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1. À¶Á¦¿Í ¾Æ¸£°ï ºÐÀ§±âÀÇ Àü±âÀúÇ× °¡¿­ÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© 14K ±Ý³³À¸·Î ³³Á¢ÇÑ °æ¿ì¿¡
ƼŸ´½ ³³Á¢ºÎÀÇ ÀÎÀå°­µµ¿Í ÇǷΰ­µµ´Â °¢°¢ 394.2MPa°ú 189.2MPaÀ» º¸¿´´Ù.
2. ¾Æ¸£°ï ºÐÀ§±âÀÇ Àû¿Ü¼± °¡¿­ÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© Ti-Ni-Cu ³³À¸·Î ³³Á¢ÇÑ °æ¿ì¿¡ ƼŸ´½
³³Á¢ºÎÀÇ ÀÎÀå°­µµ¿Í ÇǷΰ­µµ´Â °¢°¢ 385.2MPa°ú 191.2MPaÀ» º¸¿´´Ù.
3. ³³Á¢°è¸é¿¡¼­´Â ´Ù¼öÀÇ ±â°ø°ú ¼öÃà°øÀÌ °üÂûµÇ¾ú´Ù.
4. ÇÇ·ÎÆĸ鿡¼­´Â ºÎºÐÀûÀ¸·Î »êÈ­µÈ ¸é°ú striationÀÌ °üÂûµÇ¾ú´Ù.
#ÃÊ·Ï#
This study was performed to evaluate the tensile and fatigue strengths of butt joints
in titanium soldered with 14K gold and Ti-Ni-Cu alloys. Titanium rods, 30 §® in length
and 3 §® in dimeter, were polished with #2,000 emery paper and soldered using the
electric resistance heating and the infrared radiation heating devices. Tensile test was
done with a crosshead speed of 0.5 §®/min, and fatigue test was subjected to a cyclic
tensile stress of 30 §Ô using tension-type fatigue machine. The solder-matrix interface
region and the fracture surfaces were examined by scanning electron microscope.
The results obtained were summarized as follows;
1. Mean tensile strength and fatigue strength values of 394.2 MPa and 189.2 MPa
were obtained at the joint soldered with 14K gold alloy using the electric resistance
heating device.
2. Mean tensile strength and fatigue strength values of 385.2 MPa and 191.2 MPa
were obtained at the joint soldered with Ti-Ni-Cu alloy using infrared radiation heating
device.
3. Many gas and shrinkage porosities were observed in the both solder joints.
4. Partially oxidized surfaces and characteristic striations were observed in the
fractured surfaces of the both solder joints.

Å°¿öµå

butt joint in titanium; fatigue strength; 14K gold solder; tensile strength; Ti Ni-Cu solder;

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