Scholarlink

<p>This study optimizes the wear performance of stir-cast ZE41 magnesium alloy hybrid composites reinforced with Ti<sub>3</sub>SiC<sub>2</sub> (5&#xa0;wt%), NiTi (5&#xa0;wt%), and graphene oxide (2&#xa0;wt%). Mass loss of unreinforced and hybrid composite of ZE41 was investigated using a pin-on-disc tribometer under dry sliding conditions. Response surface methodology (RSM) based on Box–Behnken design (BBD) and genetic algorithm (GA) was employed to model and optimize the effects of load (20–40&#xa0;N), speed (1.0–2.0&#xa0;m/s), and distance (400–800&#xa0;m) on weight loss. ANOVA confirmed high model accuracy (R<sup>2</sup> &gt; 99.4%, <i>p</i> &lt; 0.0001), with load as the dominant factor. Optimal wear parameters predicted by RSM (20&#xa0;N, 1.0&#xa0;m/s, 440&#xa0;m) and GA (20&#xa0;N, 1.0&#xa0;m/s, 520&#xa0;m) showed excellent agreement, with confirmation errors below 5%. Under optimal conditions, the unreinforced ZE41 exhibited mass loss of 11.62&#xa0;mg (RSM) and 11.45&#xa0;mg (GA), while the ZE41 hybrid composite exhibited lower mass loss of 9.25&#xa0;mg (RSM) and 9.12&#xa0;mg (GA), representing a 20% reduction. The X-ray diffraction (XRD) confirms the presence of the incorporated Ti<sub>3</sub>SiC<sub>2</sub>, NiTi, and graphene oxide (GO) reinforcement phases without undesirable reaction products. The addition of hybrid reinforcements significantly improved the microhardness of ZE41 alloy from 62.7 ± 1.8&#xa0;HV to 86.2 ± 2.4&#xa0;HV. SEM analysis revealed that unreinforced ZE41 suffered severe abrasive wear with deep continuous grooves, while the ZE41 hybrid composite showed shallow discontinuous grooves due to reinforcement particles resisting abrasive cutting. This superior wear resistance is attributed to load bearing, groove interruption, and reduced material detachment mechanisms.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Wear performance optimization of stir-cast magnesium-based hybrid composites using response surface methodology and genetic algorithm

  • 期刊论文

  • 发表日期：

    2026年7月8日

查看全文
  • Abreham Dereje Abebe,
  • Habtamu Beri Tufa,
  • Esmael Adem Esleman,
  • Tesfay Gebremichael Reda

摘要

This study optimizes the wear performance of stir-cast ZE41 magnesium alloy hybrid composites reinforced with Ti3SiC2 (5 wt%), NiTi (5 wt%), and graphene oxide (2 wt%). Mass loss of unreinforced and hybrid composite of ZE41 was investigated using a pin-on-disc tribometer under dry sliding conditions. Response surface methodology (RSM) based on Box–Behnken design (BBD) and genetic algorithm (GA) was employed to model and optimize the effects of load (20–40 N), speed (1.0–2.0 m/s), and distance (400–800 m) on weight loss. ANOVA confirmed high model accuracy (R2 > 99.4%, p < 0.0001), with load as the dominant factor. Optimal wear parameters predicted by RSM (20 N, 1.0 m/s, 440 m) and GA (20 N, 1.0 m/s, 520 m) showed excellent agreement, with confirmation errors below 5%. Under optimal conditions, the unreinforced ZE41 exhibited mass loss of 11.62 mg (RSM) and 11.45 mg (GA), while the ZE41 hybrid composite exhibited lower mass loss of 9.25 mg (RSM) and 9.12 mg (GA), representing a 20% reduction. The X-ray diffraction (XRD) confirms the presence of the incorporated Ti3SiC2, NiTi, and graphene oxide (GO) reinforcement phases without undesirable reaction products. The addition of hybrid reinforcements significantly improved the microhardness of ZE41 alloy from 62.7 ± 1.8 HV to 86.2 ± 2.4 HV. SEM analysis revealed that unreinforced ZE41 suffered severe abrasive wear with deep continuous grooves, while the ZE41 hybrid composite showed shallow discontinuous grooves due to reinforcement particles resisting abrasive cutting. This superior wear resistance is attributed to load bearing, groove interruption, and reduced material detachment mechanisms.