1. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 The new friction tester. Letters in the photo signify: S, sample holder; T, tool; HN, hydraulics generating normal contact pressure; and HS, hydraulics for actuating horizontal sliding. When the sliding table is the tool and the sheet specimen is mounted at the top, it represents the new testing method. The tester can be operated in the traditional mode, as well, by having the tool on the upper side and a large sheet sample is placed on the sliding table. Figure Legend:

2. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 An example of friction data output from the GIFT friction tester. The TRIP780 sample was tested using a low-viscosity lubricant (explained later) at 50 MPa normal contact pressure. Figure Legend:

3. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 Change of friction coefficient with sliding speed. The material was TRIP780; the low-viscosity lubricant was used; and the contact pressure was 12.5 MPa. Figure Legend:

4. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 The dependence of friction coefficient for TRIP780 steel sheet on the lubrication condition, contact stress and sliding distance. The sliding speed was set at 10 mm/s. (a) No lubricant, (b) low-viscosity lubricant, and (c) high-viscosity lubricant. For every condition, the experiment was conducted in triplicates, and the three results were found to be reasonably similar. Therefore, one data curve is presented for each condition. Figure Legend:

5. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 Dependence of friction coefficient under dry or lubricated conditions and a range of contact pressures. The sample was TR780 steel, and the sliding speed was 10 mm/s. Figure Legend:

6. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 Subsurface microhardness profile in friction tested TRIP780 steel under a high contact stress of 450 MPa under nonlubricated condition Figure Legend:

7. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 Volume fraction of retained austenite below the surface of the TRIP780 steel sample tested under a high 450 MPa contact load Figure Legend:

8. Date of download: 5/31/2016 Copyright © ASME. All rights reserved. From: Frictional Behaviors of a Mild Steel and a TRIP780 Steel Under a Wide Range of Contact Stress and Sliding Speed J. Tribol. 2014;136(2):021606-021606-7. doi:10.1115/1.4026346 Residual stress in the ferrite phase in TRIP780 steel tested in friction under a high 450 MPa contact pressure in nonlubricated condition Figure Legend: