PENGARUH VARIASI WAKTU GESEK TERHADAP KEKUATAN TARIK STRUKTUR MIKRO DAN KEKERASAN SAMBUNGAN LOGAM SILINDER PEJAL ALUMUNIUM 6061 T6 MENGGUNAKAN METODE CONTINUOUS DRIVE FRICTION WELDING
Abstract
Continuous drive friction welding (CDFW) is a solid state welding method
that suitable to be applied on solid metal cylinder splicing. In the process of CDFW
joint uses several important parameters that affects on the strength of joint. There are
several important parameters, such as: friction time, friction pressure, upset time,
upset pressure and rotational speed. This study was conducted to determine the effect
of friction time variation on tensile strength, microstructure and hardness of
almunium joint with CDFW.
The material used in this study is aluminum solid metal cylinder 6061 T6. The
welding process using variation of time friction parameters 2, 3, 4, 5, 6, 7, 8, 9, 10
seconds. While the other parameters keep constant, that are 30 MPa friction pressure,
70 MPa upset pressure, 2 second upset time and rotational speed 1000 rpm. To
evaluate the effect of time friction on the joint, micro structure, examanition of
Vickers hardness test, and tensile test were carried.
From the microstructure examinition, the micro structure which is closer to
the joint of Mg content indicated by black grain on the specimen. Hardness specimen
decrease the hardness value as the distance from joint closes. Maximum drag highest
tensile strength was found on the speciment with at 6 seconds friction time (215,76
MPa), while the lowest tensile strength obtained on the specimen with that of 2 se
seconds is (78,60 MPa).