Transient creep characteristics of Tin Base Alloy
Abstract
Abstract: Transient creep experiments were inspected under several used stresses extended from 10 to 19.5
MPa for three ternary eutectic (Sn-3.5Ag- xIn) alloys, where x takes the values (x= 0.5, 1 and 1.5 In ). All tests
at temperatures, ranging from 303 to 393 K. The transient creep is classified by εtr = βtn, where εtr and t are
the transient creep strain and time. The exponent n was found to have values extended from 0.646 to 1.59 for
Sn-3.5Ag-0.5In, ranging from 0.82 to 1.64 for the second alloy Sn-3.5Ag-1In, and finally it is ranging from 0.94
to 1.74 for Sn-3.5Ag-1.5In. The value of β was found to have values ranging between -14.38 to -7.2, -13.85 to -7,
and -13.55 to -6.8 for the three alloys; the activation enthalpy shows that the operating mechanism controlling
the tin process may be the grain bounding diffusion. Also, X-ray diffraction examination displays the permanence
of both β-Sn rich phase and the intermetallic compound Ag3Sn and very little particles or residue from the
intermetallic composition γ-In Sn4.
