Temperature–Load-Dependent Wear Transitions of PH 15–5 Stainless Steel Under Dry Sliding
Steel Research International, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/srin.70697
- Dergi Adı: Steel Research International
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: ball-on-flat, dry sliding wear, low temperature wear, nanoindentation, PH 15–5 stainless steel, tribological behavior
- Gazi Üniversitesi Adresli: Evet
Özet
The dry sliding behavior of PH 15–5 precipitation-hardened stainless steel was investigated at room temperature and −40 °C under 10 and 20 N using reciprocating ball-on-disc tests. A 6 mm WC–Co ball was used at 34 mm s−1 for 30 min, corresponding to 61.2 m sliding distance. Friction, wear volume, surface morphology, elemental distribution, phase constitution, topography, and room-temperature nanoindentation response were evaluated. The H1025-aged steel exhibited a predominantly lath-martensitic morphology, a hardness of ~4.15 GPa, and a reduced elastic modulus of ~220 GPa. At 10 N, −40 °C produced lower wear volume and a shallower track than room temperature despite a higher steady-state mean coefficient of friction (CoF). At 20 N, −40 °C yielded the highest steady-state mean CoF, temporal variability, wear volume, and track depth, together with extensive cracking, deep grooves, coarse debris, and large delaminated regions. Room-temperature wear showed surface smearing, localized adhesion, and more uniformly distributed oxygen-rich regions. The low-temperature morphology is consistent with crack-assisted delamination; however, without cross-sectional characterization or low-temperature fracture testing, crack-initiation depth and propagation path could not be established. The results show that the sub-zero response depends strongly on applied load and cannot be inferred from friction magnitude alone.