ISO 6601-2002 pdf download.Plastics – Friction and wear by sliding – ldentification of test parameters.
ISO 6601 identifies the parameters associated with the friction and wear of plastics and the conditions that test methods should address to determine these characteristics.
It is intended to provide a basis for further International Standards dealing with methods of test and the specifications of materials.
2 General
The sliding friction behaviour of one material against another can be defined by such terms as the coefficient of friction, rate of wear, resistance to seizure or the pi’-limit” factor1.
These terms are dependent on various parameters which may be classified into three groups:
a) intrinsic parameters relating to the materials involved, such as their nature, physico-chemical state, surface condition and finish;
b) external parameters relating to the sliding conditions, such as applied load, sliding velocity, characteristics of the motion, mode of contact (see Figure 1), ambient conditions (temperature, humidity) and interstitial matter (lubricant, wear debris);
c) parameters depending on both the nature of the materials involved and the sliding conditions, particularly the surface temperature of the rubbing surfaces.
3 Analysis of friction and wear tests
3.1 General
Friction and wear processes can be described by systematic analysis of the parameters given in 3.2 to 3.5.
3.2 Technical function of tribological systems
For example: transmission of motion, restriction of motion. transmission of force.
3.3 Variables involved in the friction and wear process
a) type of motion (sliding, rolling, impact, flow or any combination thereof):
b) variation with time (continuous, oscillatory, intermittent);
C) normal load, F
d) surface velocity, v;
e) temperature. T;
f) test duration. t.
3.4 Structure of tribological systems
3.4.1 Elements
a) body;
b) counter-body:
C) interfacial medium:
d) surrounding medium.
3.4.2 PropertIes of the elements
a) bulk properties (chemical composition, physical characterist,cs, mechanical properties, hardness); b) surface properties (roughness and physico•chemical characteristics).
3.4.3 Interactions between the elements
a) mode of contact (see Figure 1):
b) type of friction (dry friction, boundary lubrication, mixed lubrication, hydrodynamic lubrication, gas lubrication);
C) wear mechanisms. which are often classified into
1) adhesive wear by tearing of adhered parts from sliding surfaces,
2) abrasive wear (abrasion) by hard particles present on sliding surfaces,
3) degradative wear by a hostile environment,
4) surface fatigue wear by a process of rolling over a track, and
5) surface wearing asperities creating ploughed surface protuberances (material deposited alongside the furrow).ISO 6601 pdf download.