Term
| The surface of a brittle fracture usually is |
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Definition
| Flat and perpendicular to the applied stress |
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Term
| The Chevron pattern on britlte fractured surfaces helps determine |
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Definition
| The origin of the failure |
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Term
| The stress intensifies for cracks that are |
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Definition
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Term
| A ductile fractuer is characterized by |
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Definition
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Term
| These form when a high stress causes separation of the metal at grain boundaries between the metal and small impurity particles |
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Definition
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Term
| The ability of a material containing a flaw to withstand an applied load. |
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Definition
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Term
| In fracture mechanics, a flaw refers to: |
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Definition
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Term
| The following are important variables in fracture mechanics except: |
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Definition
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Term
| The fracture toughness of a material can be decreased by the following except: |
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Definition
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Term
| The fracture toughness of a material can be decreased by the following except: |
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Definition
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Term
| Necking is observed in what type of fracture? |
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Definition
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Term
| In addition to failure due to fatigue, polymers are especially are susceptible to another form of failure that presents below the yield strength and tends to increase with temperature. This is known as: |
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Definition
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Term
| A fatigue fracture doesn't always show beach marks. (T or F) |
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Definition
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Term
| The strength of a large collection of samples of primarily ductile materials (such as polymers), follows approximately: |
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Definition
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Term
| Fatigue Fracture occurs in 3 general steps. These steps are (in order from first to last): |
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Definition
| Initiation, propagation, and failure. |
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Term
| The strength of a large collection of samples of primarily brittle materials (such as ceramics) follows approximately: |
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Definition
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Term
| The weibull modulus for 7075 aluminum would likely be in the range of: |
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Definition
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Term
| Brittle stress-rupture failures occur more often at _____ creep rates and _____ temperatures. |
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Definition
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Term
| In climb, atoms move by _____ in a direction _____ to the slip plane. |
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Definition
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Term
| Inorganic silicate glass is especially prone to failure by reaction with: |
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Definition
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Term
| Which of the following does NOT contribute to creep? |
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Definition
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Term
| For a typical creep curve, what stage is steady state? |
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Definition
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Term
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Definition
| Change in strain over time |
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Term
| What is the stress amplitude if the maximum tensile stress is 25 psi and the minimum stress is a 15 psi compressive stress? |
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Definition
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Term
| For stress corrosion failures, what microstructural effects along grain boundaries are ordinarily observed? |
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Definition
| Extensive branching of the cracks |
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Term
| As the material's temperature increases, fatigue life _____ and endurance limit _____. |
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Definition
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