Searching for evidence of strengthening from short-range order in the CrCoNi medium entropy alloy
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866918145345716224 |
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| author | Rasooli, Novin Daly, Matthew |
| author_facet | Rasooli, Novin Daly, Matthew |
| contents | The coupling of strength to short-range order (SRO) in the CrCoNi medium entropy alloy remains actively investigated, with conflicting reports supporting and opposing SRO-induced strengthening continuing to emerge. A direct observation of this effect is elusive, due to difficulties in the quantification of SRO. Here, we deliver a structurally agnostic analysis that instead searches for unusual patterns in crystal size effects as evidence of SRO-induced strengthening. For this purpose, we assemble a large dataset of strengthening measurements drawn from a range of thermomechanical processing conditions known to produce SRO. Based on a comparative analysis with pure metal benchmarks, we find no evidence for significant coupling of SRO to strengthening in CrCoNi, and that patterns suggesting a positive finding may be explained by cross-study measurement scatter. Nevertheless, we leverage our analysis to provide an upper bound estimate of SRO-induced strengthening in the unlikely scenario where other sources of scatter are negligible. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01147 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searching for evidence of strengthening from short-range order in the CrCoNi medium entropy alloy Rasooli, Novin Daly, Matthew Materials Science The coupling of strength to short-range order (SRO) in the CrCoNi medium entropy alloy remains actively investigated, with conflicting reports supporting and opposing SRO-induced strengthening continuing to emerge. A direct observation of this effect is elusive, due to difficulties in the quantification of SRO. Here, we deliver a structurally agnostic analysis that instead searches for unusual patterns in crystal size effects as evidence of SRO-induced strengthening. For this purpose, we assemble a large dataset of strengthening measurements drawn from a range of thermomechanical processing conditions known to produce SRO. Based on a comparative analysis with pure metal benchmarks, we find no evidence for significant coupling of SRO to strengthening in CrCoNi, and that patterns suggesting a positive finding may be explained by cross-study measurement scatter. Nevertheless, we leverage our analysis to provide an upper bound estimate of SRO-induced strengthening in the unlikely scenario where other sources of scatter are negligible. |
| title | Searching for evidence of strengthening from short-range order in the CrCoNi medium entropy alloy |
| topic | Materials Science |
| url | https://arxiv.org/abs/2507.01147 |